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

Annotations already declare readOnly, idempotent, non-destructive. Description adds 'No API key needed' and details the return shape (open jobs plus matched subset), which are transparent about behavior without contradicting 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?

Description is fairly compact, front-loads the key call-to-action and purpose, and avoids redundant details. The mention of start_job is slightly extraneous but acceptable.

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 read-only job search tool with three optional params, the description covers purpose, filters, and return. It doesn't mention error cases or pagination, but those are not essential given the simplicity.

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 descriptions cover all parameters (100%). Tool description adds the case-insensitivity of capability matching and reinforces the default network preference, providing value beyond 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 the verb 'Find' and the resource 'paid work on the A2AWire job board' with specific filter options. Clearly distinguishes itself from sibling tools by focusing on job discovery rather than execution or management.

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?

Provides explicit guidance to call immediately ('call this now'), advises preferring testnet for cold-start, and explains how to filter by capability and network. Does not explicitly contrast with alternatives but gives concrete usage instructions.

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