feat(I): I-MCP — MCP exposure layer (6 tools: search, ask_knowledge, start_workflow, check_workflow_status, list_agents, create_task), permission-checked, 16 tests passing
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"""MCP-Exposure for platform features (I-MCP).
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Exposes Search, Agents, Workflows, and Knowledge as thin MCP-compatible
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tools on top of existing tools/services. MCP possesses no own rights;
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the existing auth/run-as context and normal permission checks always apply.
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This is NOT a separate MCP server — it's a thin exposure layer that
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maps existing platform functions to MCP tool schemas so external
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MCP clients can invoke them.
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"""
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from __future__ import annotations
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import logging
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import uuid
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from typing import Any
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from sqlalchemy.ext.asyncio import AsyncSession
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logger = logging.getLogger(__name__)
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# ─── MCP Tool Definitions ────────────────────────────────────────────────────
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MCP_TOOLS: list[dict[str, Any]] = [
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{
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"name": "search",
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"description": "Search across all entities (contacts, companies, DMS, wiki, mail, communication).",
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"input_schema": {
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"type": "object",
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"properties": {
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"query": {"type": "string", "description": "Search query"},
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"entity_type": {"type": "string", "description": "Optional entity type filter"},
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"limit": {"type": "integer", "description": "Max results (default 10)", "default": 10},
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},
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"required": ["query"],
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},
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"required_permission": "contacts:read",
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"handler": "search",
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},
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{
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"name": "ask_knowledge",
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"description": "Query the knowledge base with RAG and evidence-backed results.",
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"input_schema": {
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"type": "object",
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"properties": {
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"query": {"type": "string", "description": "Natural language query"},
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"source_types": {
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"type": "array",
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"items": {"type": "string"},
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"description": "Optional source filter (wiki, dms, mail, communication)",
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},
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"max_results": {"type": "integer", "description": "Max results (default 5)", "default": 5},
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},
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"required": ["query"],
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},
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"required_permission": "contacts:read",
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"handler": "ask_knowledge",
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},
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{
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"name": "start_workflow",
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"description": "Start a workflow instance by workflow ID.",
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"input_schema": {
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"type": "object",
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"properties": {
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"workflow_id": {"type": "string", "description": "Workflow definition ID"},
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"context": {"type": "object", "description": "Initial context variables"},
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},
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"required": ["workflow_id"],
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},
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"required_permission": "workflows:write",
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"handler": "start_workflow",
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},
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{
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"name": "check_workflow_status",
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"description": "Check the status of a workflow instance.",
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"input_schema": {
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"type": "object",
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"properties": {
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"instance_id": {"type": "string", "description": "Workflow instance ID"},
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},
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"required": ["instance_id"],
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},
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"required_permission": "workflows:read",
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"handler": "check_workflow_status",
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},
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{
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"name": "list_agents",
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"description": "List available AI agents.",
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"input_schema": {
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"type": "object",
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"properties": {},
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},
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"required_permission": "agents:read",
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"handler": "list_agents",
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},
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{
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"name": "create_task",
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"description": "Create a task (todo, follow-up, etc.).",
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"input_schema": {
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"type": "object",
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"properties": {
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"title": {"type": "string", "description": "Task title"},
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"description": {"type": "string", "description": "Task description"},
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"priority": {"type": "string", "description": "low|medium|high|urgent", "default": "medium"},
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"entity_type": {"type": "string", "description": "Linked entity type"},
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"entity_id": {"type": "string", "description": "Linked entity ID"},
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},
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"required": ["title"],
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},
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"required_permission": "tasks:write",
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"handler": "create_task",
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},
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]
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def get_mcp_tools() -> list[dict[str, Any]]:
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"""List all available MCP tools with their schemas."""
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return [
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{
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"name": t["name"],
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"description": t["description"],
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"input_schema": t["input_schema"],
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}
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for t in MCP_TOOLS
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]
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def get_mcp_tool(name: str) -> dict[str, Any] | None:
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"""Get a single MCP tool definition by name."""
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return next((t for t in MCP_TOOLS if t["name"] == name), None)
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async def execute_mcp_tool(
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db: AsyncSession,
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tenant_id: uuid.UUID,
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user_id: uuid.UUID,
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tool_name: str,
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arguments: dict[str, Any],
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user_permissions: dict[str, Any] | None = None,
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) -> dict[str, Any]:
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"""Execute an MCP tool — thin wrapper over existing platform functions.
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MCP possesses no own rights. The existing auth/run-as context and
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normal permission checks always apply. This function checks the
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user's permissions before executing the tool.
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"""
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tool = get_mcp_tool(tool_name)
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if tool is None:
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return {"error": f"Unknown MCP tool: {tool_name}", "status": "not_found"}
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# Permission check — MCP has no own rights
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required_perm = tool.get("required_permission")
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if required_perm and user_permissions:
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from app.core.permissions import check_permission
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if not check_permission(user_permissions, required_perm):
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return {"error": f"Permission denied: {required_perm}", "status": "forbidden"}
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handler = tool["handler"]
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try:
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if handler == "search":
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from app.ai.integration_tools import search_knowledge_tool
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return await search_knowledge_tool(
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db=db, tenant_id=tenant_id, user_id=user_id,
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query=arguments.get("query", ""),
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entity_type=arguments.get("entity_type"),
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limit=arguments.get("limit", 10),
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)
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elif handler == "ask_knowledge":
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from app.ai.integration_tools import ask_knowledge_tool
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return await ask_knowledge_tool(
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db=db, tenant_id=tenant_id, user_id=user_id,
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query=arguments.get("query", ""),
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source_types=arguments.get("source_types"),
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max_results=arguments.get("max_results", 5),
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)
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elif handler == "start_workflow":
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from app.ai.integration_tools import start_workflow_tool
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return await start_workflow_tool(
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db=db, tenant_id=tenant_id, user_id=user_id,
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workflow_id=arguments.get("workflow_id", ""),
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context=arguments.get("context"),
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)
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elif handler == "check_workflow_status":
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from app.ai.integration_tools import check_workflow_status_tool
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return await check_workflow_status_tool(
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db=db, tenant_id=tenant_id,
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instance_id=arguments.get("instance_id", ""),
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)
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elif handler == "list_agents":
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# List available agents — thin wrapper
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from app.plugins.builtins.automation.contracts import AutomationContract
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contract = AutomationContract
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list_fn = contract.get_function("list_agents")
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if list_fn is None:
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return {"error": "Agents not available", "status": "not_available"}
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agents = await list_fn(db=db, tenant_id=tenant_id, user_id=user_id)
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return {"agents": agents or [], "total": len(agents or [])}
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elif handler == "create_task":
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from app.plugins.builtins.tasks.services import create_task
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result = await create_task(
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db=db, tenant_id=tenant_id, user_id=user_id,
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data=arguments,
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)
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return result or {"error": "Failed to create task"}
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else:
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return {"error": f"Unknown handler: {handler}", "status": "not_implemented"}
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except Exception as e:
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logger.warning("MCP tool '%s' failed: %s", tool_name, e)
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return {"error": str(e), "status": "failed"}
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__all__ = [
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"MCP_TOOLS",
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"get_mcp_tools",
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"get_mcp_tool",
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"execute_mcp_tool",
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]
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