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

With no annotations provided, the description carries the full burden. It discloses the topics covered but does not explain behavioral aspects such as the optional 'confidence' parameter, what happens when it is omitted, or the output format. For a tool that likely produces explanation text, this lack of detail about invocation behavior is a notable 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, well-structured sentence that front-loads the verb and resource. It is dense with relevant information and contains no filler or redundancy, achieving maximum efficiency.

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 tool with one optional parameter and no output schema, the description covers the core purpose but misses key context: how to use the parameter and what kind of answer to expect. It is minimally acceptable but not complete enough to fully guide an agent without additional inference.

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 description does not mention the 'confidence' parameter at all. Since there is one optional enum parameter, the description should clarify whether providing a value limits the explanation to that level or explains the entire vocabulary. It does not, leaving the parameter's effect ambiguous.

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 ('Explain') and a specific resource ('the OEX A–D record-confidence vocabulary'), and further details the content ('weakest-input rule for derived values', 'interpretation contract'). This distinguishes it from sibling tools that retrieve or compare data, making the purpose clear and unique.

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 implies usage when one needs to understand confidence levels, but it does not explicitly state when to use this tool versus alternatives like 'explain_truth_state' or when not to use it. There are no exclusions or alternative references, so guidance is only implicit.

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