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

With no annotations, the description carries the full burden, and it does disclose a real behavioral trait: the tool refuses with a do_not_answer signal when content is drifted or unverified rather than guessing. However, it leaves unexplained what counts as 'drifted', how a caller should react to do_not_answer, and how the fact is returned.

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, front-loaded with the core action and followed by the failure policy. Nothing is redundant or padded.

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 one-parameter single-record fetch this is close to adequate, especially since no output schema exists and the refusal contract is stated. The critical gap is the missing guidance on sourcing fact_id, which is the only input the tool requires.

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% and the single required parameter fact_id is completely undocumented in both schema and description. The description never says what a fact_id looks like or where to obtain one, so an agent is left without a way to supply a valid value.

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 a specific verb and resource (get one verified fact) scoped to the pettraveluk pack, which lets an agent distinguish it from other domain packs. It does not explicitly contrast itself with the sibling pettraveluk_list_facts or pettraveluk_changes, so classification within the pack must be inferred from the name.

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?

There is no statement of when to call this versus pettraveluk_list_facts (to discover IDs) or pettraveluk_changes (to check for updates). The only usage-adjacent content is the refusal clause, which describes an outcome rather than a selection rule.

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