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

With no annotations provided, the description carries the full burden and discloses the key behavioral trait (fields become non-editable static content) and the return value (success status and output path). It also surfaces the cost per call. It does not disclose error handling or edge cases, but the core behavior is well covered.

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 three concise sentences covering purpose, return value, and cost. Every sentence adds relevant information with no redundancy or filler.

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 targeted flatten operation with a comprehensive schema and an output schema, the description covers the core action, output, and pricing. It lacks explicit usage guidance (when to use vs. alternatives), but the tool's simplicity and clear schema make the description sufficiently complete.

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 100%, so baseline is 3. The description does not add additional meaning beyond the schema; it only mentions 'output path' in passing, which is already documented in the schema. No extra semantics are offered.

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 a specific action ('Flatten a filled PDF form') with a precise outcome ('form fields become non-editable static content'). This unambiguously distinguishes it from sibling tools like fill_form or extract_form_data.

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 context by saying 'filled PDF form' (i.e., use after filling), but does not explicitly state when to use this tool versus alternatives, nor any prerequisites or exclusions. It only conveys the action without comparative guidance.

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