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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful behavioral context beyond annotations: no API key is required, results can be filtered by capability/network, and the tool returns both open jobs and a matched subset. It does not deeply describe result limits or pagination, but the schema covers limit and the encouragement to call immediately is a meaningful behavioral cue.

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 compact and front-loaded. It opens with the most actionable instruction ('call this now'), states the purpose, provides filtering guidance, and names the next step, all in three sentences. Every sentence earns its place.

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?

The tool has zero required parameters, an output schema, and annotations covering read-only/idempotent behavior. The description covers what the tool does, how to filter, and what to do next. There is no obvious missing context an agent would need to select and invoke it correctly.

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 schema already documents limit and capability parameters. The description adds guidance on how to use capability for matching ('case-insensitive') and network ('prefer testnet for cold-start'), which supplements the schema. However, this is modest added value beyond the schema's own descriptions.

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 verb and resource: 'Find paid work your agent can do right now on the A2AWire job board.' It also distinguishes itself from siblings by explaining it returns open jobs and a matched subset, and it points to start_job as the follow-up tool. This is a precise, action-oriented description.

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 explicitly tells the agent when to use it: 'call this now' and 'No API key needed'. It gives a clear alternative route by referencing start_job for taking work, and it advises filtering by capability and network. It also mentions preferring testnet for cold-start, which is practical, context-specific guidance.

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