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

Annotations already declare this a safe, idempotent, closed-world read, so the safety profile is covered. The description adds genuinely useful behavior beyond that: the content is paraphrased rather than verbatim standard text, and unknown topics degrade gracefully to a topic list rather than erroring — both important for an agent deciding whether to trust or retry.

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?

One dense paragraph, front-loaded with what the tool is and followed immediately by the accepted inputs and the fallback behavior. Every clause maps to a real decision the caller must make; nothing is padding.

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 single-parameter, no-output-schema reference tool, the description covers purpose, input vocabulary, and failure mode. The main remaining gap is that it does not characterize the depth or shape of the returned clause pointers, though 'short' and 'paraphrased' set expectations reasonably.

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 coverage is 0% and the single parameter has no description, so the description carries the full burden — and it does, giving concrete accepted forms for every topic class (0x27 or name, 0x78 or "nrc 78", F190, FF00, p2, p2*, s3, reprogramming_sequence). An agent can construct a valid call without opening the schema.

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?

States a specific resource ('UDS reference with ISO 14229-1 clause pointers') and enumerates the exact topic space it covers, which separates it cleanly from the build/decode siblings. It never names a sibling explicitly, but the 'reference/lookup' framing makes the distinction obvious.

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 topic enumeration implies when to reach for this tool (concept lookup during UDS work) and 'Unknown topics return a topic list' hints at how to recover from a miss. However, there is no explicit statement of when NOT to use it versus build_uds_request or decode_uds, leaving routing to inference.

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