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santoshray02

CSV Editor

by santoshray02

close_session

Terminate and clean up a CSV editing session to free system resources and ensure proper data handling.

Instructions

Close and clean up a session.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • Core implementation of the close_session tool: removes the session from the session manager, handles errors, and returns a standardized result.
    async def close_session(
        session_id: str,
        ctx: Context = None
    ) -> Dict[str, Any]:
        """Close and clean up a session.
        
        Args:
            session_id: Session ID to close
            ctx: FastMCP context
        
        Returns:
            Operation result
        """
        try:
            session_manager = get_session_manager()
            removed = await session_manager.remove_session(session_id)
            
            if not removed:
                return OperationResult(
                    success=False,
                    message="Session not found",
                    error="Invalid session ID"
                ).model_dump()
            
            if ctx:
                await ctx.info(f"Closed session {session_id}")
            
            return OperationResult(
                success=True,
                message=f"Session {session_id} closed successfully",
                session_id=session_id
            ).model_dump()
            
        except Exception as e:
            if ctx:
                await ctx.error(f"Failed to close session: {str(e)}")
            return OperationResult(
                success=False,
                message="Failed to close session",
                error=str(e)
            ).model_dump()
  • MCP tool registration for 'close_session' that delegates to the underlying implementation (_close_session).
    @mcp.tool
    async def close_session(
        session_id: str,
        ctx: Context = None
    ) -> Dict[str, Any]:
        """Close and clean up a session."""
        return await _close_session(session_id, ctx)
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Close and clean up' implies a destructive or finalizing action, but it doesn't specify whether this is reversible, what resources are freed, if there are side effects (e.g., data loss), or authentication needs. This is inadequate for a tool that likely terminates a session.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with no wasted words. It's front-loaded and directly states the core action, making it easy to parse quickly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool likely performs a destructive operation (closing/cleaning up a session) with no annotations and an output schema (which reduces the need to describe return values), the description is incomplete. It should explain behavioral aspects like irreversibility or effects on data, but the presence of an output schema slightly mitigates this gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 1 parameter with 0% description coverage, so the schema provides no semantic information. The description doesn't mention parameters at all, but since there's only one required parameter ('session_id'), the agent can reasonably infer it identifies the session to close. This is a minimal baseline, but the description doesn't add value beyond what's obvious from the schema structure.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Close and clean up a session' clearly states the verb ('close and clean up') and resource ('a session'), making the purpose understandable. It distinguishes from siblings like 'list_sessions' or 'get_session_info', but could be more specific about what 'clean up' entails (e.g., freeing resources, deleting temporary data).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives, prerequisites (e.g., must have an active session), or exclusions. It lacks context compared to siblings like 'clear_history' or 'restore_to_operation', leaving the agent to infer usage based on the tool name alone.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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