End Tool Session

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

Annotations already communicate that the operation is not read-only, is idempotent, and is not classed as destructive. The description adds the TTL context but does not disclose side effects, error behavior, or session invalidation details. Given the annotation coverage, this is adequate but not enriched.

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?

The description is one compact sentence, front-loaded with the action and followed by the relevant TTL condition. There is no filler or redundant explanation.

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 single-parameter tool with full annotation coverage, schema coverage, and an output schema, the description is nearly complete. It only omits minor behavioral details such as what happens when called with an already-expired or invalid session.

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?

Schema description coverage is 100%, and the schema already documents sessionId as the session id returned by start_tool_session. The description adds no additional parameter-level meaning, so it stays at the schema-covered baseline.

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?

The description clearly states a specific action ('End') on a specific resource ('a tool session') and adds the meaningful condition 'before its TTL expires'. This distinguishes it from associated tools like start_tool_session and tool_session_status.

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 description makes the intended usage context reasonably clear: an active tool session should be ended before its TTL expires. It does not explicitly name alternatives or provide when-not-to-use guidance, but the relationship with start_tool_session makes the use case easy to infer.

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