entain_metadata_by_url

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

Annotations already declare the tool read-only, open-world, and idempotent. The description adds the return format and clarifies that an empty object is returned when no override exists, plus that no authentication is needed, providing useful behavioral context beyond 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?

The description is extremely concise, with two lines covering purpose, return format, empty behavior, and auth. All information is front-loaded and every element adds value without redundancy.

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 single-parameter tool, the description completely covers the return shape, the empty case, and auth requirements. The annotations handle safety and idempotency, and the schema covers the parameter, so no gaps remain.

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?

The input schema already fully documents the url parameter with an example, and the description also mentions it's a URL path. With 100% schema coverage, the description adds little additional semantic value, 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 states the tool returns SEO metadata (page title) for a URL path, specifying both the resource and scope. It distinguishes itself from sibling tools by focusing on metadata lookup by URL path, and the intent is unambiguous despite the absence of an explicit verb.

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 implies usage for retrieving page title metadata but gives no explicit when-to-use guidance or alternatives. It does not mention exclusions or comparisons with sibling tools, so the agent gets minimal context for selection among many similar metadata tools.

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