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

The description discloses the possible session states, which helps set expectations about the return value. Since no annotations are present, the description carries the full burden, and it does not explicitly state that this is a read-only operation or describe error behavior, but for a simple status getter this is a moderate gap.

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, compact phrase that front-loads the core concept and enumerates useful example values. It has no wasted words, though its extreme brevity sacrifices some operational detail.

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 one-parameter tool with an existing output schema, the description conveys the main idea and possible states. It falls short by not linking the session_id parameter to the status query and by omitting any usage context or edge-case hints, making it adequate but not thorough.

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?

With schema description coverage at 0%, the description needed to explain the session_id parameter, but it never mentions it. The agent must infer that session_id identifies which session to query, with no guidance on format or usage.

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 identifies the resource as a session's state and provides concrete example values (PENDING, MEDITATIVE, COMPLETED). It is easy to distinguish from the action-oriented siblings finalize_session and start_regulation_session. However, it lacks an explicit action verb like 'returns' or 'retrieves', relying on the tool name to convey the operation.

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 gives no guidance on when to use this tool versus the sibling tools. There is no mention of preconditions, excluding cases, or typical scenarios, so an agent must infer usage solely from the tool name and context.

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