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

Annotations already establish that the call is read-only, idempotent, and non-destructive, so the description adds value by promising aggregated status/outcome counts and recent matters. The explicit 'not a...' list is a useful limitation that prevents over-interpretation of results. There is no contradiction with the annotations.

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 compact sentences front-load the action and scope before the limitation list. The negative list is somewhat long but earns its place by preventing misuse of the tool as a legal opinion.

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 one-required-parameter read tool with no output schema, the description gives sufficient orientation: input (one patent), output shape (counts and recent matters), and boundaries. 'Recent matters' is somewhat vague—no threshold or itemization—but it is not blocking for selection and invocation.

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%, with both '_apiKey' and 'patent_number' meaningfully described and an example provided. The prose adds context like 'one challenged patent' but no new syntax, format, or value constraints beyond what the schema already provides, so it sits at the high-coverage baseline.

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 opening verb 'Summarize' names a concrete action and resource ('PTAB proceedings and recorded decision outcomes for one challenged patent'). It further specifies the output ('status/outcome counts and recent matters'), and the single-patent scope clearly separates it from the broader ptab_search_* siblings.

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 phrase 'for review routing' and the negative carve-outs ('not a validity opinion, litigation forecast...') signal that this is a screening tool rather than a legal analysis tool. However, it never names a sibling or states a condition like 'use ptab_proceeding_timeline for case-level detail,' so the usage guidance 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.