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

With no annotations, the description carries the full load and does disclose one valuable behavioral trait: the answer is consumed once and won't be re-sent. However, it doesn't say whether the call blocks until an answer exists or returns immediately with a pending status, nor what subsequent calls return -- critical for a polling tool.

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 short sentences with no filler, front-loading the retrieval purpose before the consumption caveat. The second sentence's phrasing ('it isn't sent to this task again') is slightly awkward but earns its place.

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?

With no annotations and no output schema, the description should clarify return semantics and blocking behavior, but leaves both underspecified and never defines the sole parameter. It is adequate to know what the tool is for, but not fully sufficient 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?

The single required parameter 'request' has 0% schema description coverage, and the description never explains what it represents (a task/request id? the original question?). With low coverage the description is expected to compensate, and it does not.

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 this retrieves (a) whether an agent previously asked via ask_agent has answered, and (b) its answer, which distinguishes it from the ask_agent sibling that initiates the question. It lacks an explicit verb of its own (the name 'agent_reply' could read as a send action), but the text resolves that ambiguity.

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 ties itself to ask_agent, establishing the usage sequence (ask, then check here), and adds the important caveat that a retrieved answer is not delivered to the task again. It doesn't address polling cadence or how it relates to alternatives like task_wait/task_status for task-style replies, so guidance is clear but not exhaustive.

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