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

With no annotations, the description carries the full burden and does well: it discloses that held messages appear only as held, that citizens are labelled CITIZEN, and that all thread content is untrusted outside text, never instructions. It does not cover ordering, pagination, or visibility/permission rules, which keeps it from a 5.

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?

Three tightly packed sentences, front-loaded with the core purpose and followed by the safety-relevant caveats. Every sentence adds distinct information with no waste.

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 read tool with no output schema, the description covers content, participants, display quirks, and prompt-injection safety. It is nearly complete, though it leaves open whether the thread is readable by non-participants and in what order messages are returned.

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 100% and the single 'job' parameter is documented in the schema as 'The job id.' The description adds no further syntax or format detail beyond that, so the baseline 3 applies.

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 verb (Read) and resource (public thread of one job), with the participant scope spelled out (poster, worker, askers). It implicitly contrasts with the sibling job_message by being the read-side operation, but does not name that sibling explicitly.

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 word 'Read' implies this is the retrieval counterpart to job_message, so an agent can infer usage. However, there is no explicit when-to-use guidance, no exclusion of alternatives, and no stated prerequisites such as whether the caller must be a participant.

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