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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds useful behavioral context by stating that results are 'the most recently updated bills' and are optionally scoped/filtered, but it does not disclose additional traits like pagination behavior or response structure beyond what the schema already implies.

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 with the core purpose, followed by return behavior and a concrete use case. Minor redundancy exists between 'recent... bills and resolutions' and 'most recently updated bills,' but overall every sentence contributes useful guidance.

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 read-only search/list tool with fully documented parameters, the description is adequate: it states the resource, the result focus, the optional filters, and the intended use. No output schema exists, so a bit more detail about the response shape could improve completeness, but the description covers the essential selection and invocation context.

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 all five parameters already have meaningful descriptions. The tool description lightly echoes the query and congress parameters but adds no new semantic detail beyond the schema, so the baseline score of 3 is appropriate.

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 identifies the verb and resource: 'Search or list recent U.S. federal bills and resolutions from Congress.gov.' It further narrows the purpose with 'most recently updated bills' and explains the use case as finding legislation by topic or seeing what is currently moving, which distinguishes it from sibling tools like congress_bill_details or congress_recent_laws.

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 explicit context for when to use the tool: 'Use this to find legislation by topic or to see what is currently moving.' However, it does not state exclusions or explicitly mention alternatives, such as using congress_bill_details for a specific bill's full record or congress_recent_laws for enacted laws.

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