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

With no annotations, the description carries the full burden. It discloses that the action blocks further send_message calls, that it's irreversible from the caller's side, and that the owner must act from the dashboard. This is solid, though it could mention what happens on decline (e.g., session state) for completeness.

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?

Two sentences with no fluff, front-loaded with the action and examples. The structure is efficient and readable, though slightly dense. It earns a 4 for being appropriately concise without sacrificing key details.

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?

Given no output schema and no annotations, the description covers purpose, usage, and main behavioral effects. It doesn't detail error handling beyond session_not_active or the exact resume/decline flow, but these are secondary. For a pause action, it's sufficiently complete for an agent to call it correctly.

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 coverage is only 33% (sessionId has no description, and auth is nested with its own descriptions). The description adds minimal parameter meaning—only implying sessionId is your own session. It does not clarify the auth parameter's role beyond what the schema already provides, failing to compensate for the low coverage.

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 (pause a session), the specific resource (your own active session), and distinguishes it from alternatives ('rather than sending the next message or closing outright'). Concrete examples (price, legal term) further clarify intent, making it unambiguous.

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?

It explicitly contrasts with sending a message or closing, and provides contextual triggers (before agreeing to something needing human review). It also explains the consequence (blocks send_message) and the owner's role in resuming/declining, giving clear when-to-use guidance.

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