close_game

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

With no annotations, the description carries the full burden and does the most important part: it bounds the blast radius by declaring that only this session's engine processes and ENet relay are terminated. It omits secondary behavior such as whether the call is idempotent, what happens if no game is running, or whether in-progress game state is discarded.

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

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

A single sentence with zero filler, and the limiting qualifier 'only ... created by this MCP session' is placed where it matters most. Nothing could be removed without losing information.

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

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

For a no-argument, no-output-schema session teardown tool, the description covers what is affected and the safety boundary. What remains unsaid is the lifecycle context (when in a session it should be invoked) and any confirmation of what the call returns.

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

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

The tool takes zero parameters, so there is nothing for the description to disambiguate; baseline 4 applies. The scope wording correctly signals that targeting is implicit rather than argument-driven.

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

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

States a concrete verb ('Close') and concrete resources ('engine processes and ENet relay'), and scopes them to 'created by this MCP session'. That scope phrase distinguishes it from any cleanup tool that would touch other sessions, though no sibling is named explicitly.

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

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

The word 'only' implies a when-not condition (do not close processes belonging to other sessions), but there is no explicit trigger such as 'call this when you are done playing' and no named alternative among siblings. Usage is inferable rather than stated.

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