End Session

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

Annotations already indicate this is a non-destructive write operation (readOnlyHint=false, destructiveHint=false). The description adds the qualifier 'active tracked' which implies the session must be currently active, but it does not disclose side effects such as whether the session can be resumed or what happens to related data. This is minimal value beyond annotations.

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 a single, concise sentence that is immediately understandable. No filler or redundant 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 simple tool with two parameters and clear annotations, the description is adequate. It states the core purpose, and the schema covers parameter details. However, it could be more complete by mentioning what 'end' entails (e.g., stops tracking, marks it complete), but given the low complexity, this is a minor gap.

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 input schema provides 100% coverage for parameters, with descriptions for both session_id and project. The tool description does not add any additional parameter semantics, so the baseline score of 3 applies.

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 the tool's function: 'End an active tracked session.' It uses a specific verb ('End') and identifies the resource ('active tracked session'), distinguishing it from sibling tools like start_session and list_sessions.

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?

Usage context is implied by the description and tool name, but there are no explicit instructions on when to use this tool versus alternatives, nor any exclusions (e.g., cannot end already-ended sessions). The sibling tool start_session provides implicit contrast, but no direct guidance is given.

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