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

Annotations already cover the read-only, non-destructive, closed-world safety profile. The description adds useful behavior beyond that: it reads a sitemap index, discovers published pages, and notes that an optional query ranks likely relevant page URLs first. It does not discuss rate limits or return details, but the addition is meaningful.

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 three tightly written sentences with no filler. It front-loads the core action and then adds usage context and query behavior in a logical order.

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 discovery tool with full schema parameter coverage, safety annotations, and no output schema, the description is complete. It explains what is read, why to use it, and how the optional query affects ordering.

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 coverage is 100%, so the baseline is 3. The description adds semantics for the query parameter by explaining that it 'ranks likely relevant page URLs first,' which is not stated in the schema and clarifies the parameter's effect.

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 states a specific verb and resource: 'Read the current PoolProFlorida.com sitemap index and discover published site pages.' It clearly distinguishes the tool from sibling read_site_page by positioning it as a discovery step before reading page content.

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?

It gives clear usage context: 'Use this to find the correct Pool Pro Florida page before reading current website content.' This implies the natural alternative, read_site_page, but does not explicitly name it or state when-not to use this tool.

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