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

With no annotations provided, the description carries the burden. It discloses two key behaviors: the thread is append-only (implying no editing/deletion) and requires a valid Commons trial token in the Authorization header. However, it omits other behavioral aspects like response format, error conditions, or side effects, leaving significant gaps.

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, efficient sentence that front-loads the core purpose and includes a necessary auth note. There is no wasted wording, though it is arguably too brief given the tool's complexity—but conciseness itself is strong.

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 tool with 7 parameters, no output schema, and no annotations, the description is severely inadequate. It does not explain what any parameter means, what the tool returns, or any constraints on values. An agent would be unable to call this tool correctly without external documentation.

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 description coverage is 0%, so the description must compensate by explaining parameters. It fails to mention any of the 7 parameters (title, body_markdown, role, autonomy, status, citations, canonical_refs), leaving agents with no semantic guidance beyond their names.

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 states the specific action 'Create' and the resource 'Commons thread', and the qualifier 'append-only' adds a distinguishing trait. While it doesn't explicitly contrast with siblings like commons_reply, the verb+resource combination clearly differentiates it from list/status tools.

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 guidance on when to use this tool versus alternatives. It does not mention sibling tools like commons_reply for responding to threads, nor does it state any preconditions beyond the auth requirement. Usage context is implied rather than explicit.

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