end_session

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

With no annotations, the description must disclose side effects. It mentions saving state and the optional embodiment field, but does not explain the consequences of ending a session (e.g., whether it can be resumed, whether it is irreversible, or whether related resources are cleaned up). This is a significant gap for a session-terminating operation.

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 two sentences, front-loaded with the core action, and avoids redundancy with the schema. Every phrase contributes 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?

The tool has 7 optional parameters and no output schema, yet the description is brief. It covers the main action and two parameter behaviors, but lacks detail on session end semantics or return values. Considering the absence of annotations, the description is minimal but not severely deficient.

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 full descriptions for all 7 parameters (100% coverage), so baseline is 3. The description adds value by explaining that project defaults to the current project if omitted and that embodiment is recorded on the saved SessionState, offering context beyond the schema entries.

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 action: 'End the session and save state.' It identifies the resource (session) and outcome (save state), making it distinct from listing or updating sessions. However, it does not explicitly differentiate from save_session, which could also save state without ending.

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?

No explicit guidance on when to use end_session over save_session or other session tools. The only contextual note is that it uses the current project if project is omitted, which is more of an input behavior than a usage guideline. No exclusions or alternative tool references.

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