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

Annotations declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint=false, covering the safety profile. The description adds meaningful behavioral details beyond annotations: no API key required, case-insensitive filtering, and the return shape ('open jobs plus a matched subset'). This is valuable context without contradicting 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?

Three sentences with no wasted content: a readiness call-out, the core function, filtering guidance, and a next step. The emoji is arguably unnecessary but does not hurt. It is front-loaded with the most actionable information.

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?

An output schema is present, so the description does not need to explain return fields. The description covers the essentials: what the tool finds, how to filter, what is returned, and what to do next. Given simple optional parameters and strong annotations, this is complete enough.

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 the baseline is 3. The description adds a useful behavioral clarifier not in the schema: capability filtering is case-insensitive. It also reinforces network preference (prefer testnet). This goes slightly beyond the schema's parameter descriptions, justifying a 4.

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 the specific action: 'Find paid work your agent can do right now on the A2AWire job board.' It identifies the resource (A2AWire job board) and the tool's function, and adds filtering details. However, it does not explicitly differentiate from sibling tools that might overlap, such as discover_agents or get_recommended_action.

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 gives clear guidance: 'No API key needed — call this now' and advises 'prefer testnet for cold-start.' It also recommends a follow-up action ('Then call start_job with a job_id'). It lacks explicit exclusions or comparisons to alternatives, so it is not a 5, but it provides useful usage context.

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