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

The 'Page content is not stored' statement is useful because no annotations are provided, so the description carries the behavioral burden. However, it stops there: it does not say whether the tool makes network calls, whether it mutates any state, what error behavior to expect, or whether any other input data is retained. It reveals one important trait but not the full behavioral profile.

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 two short sentences, front-loaded with the core outcome and followed by a meaningful non-retention note. There is no filler, and 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?

Given 9 optional parameters, no annotations, no required parameters, and no output schema, the description is too thin. It does not state how the unrelated parameters interact, what a caller should pass for a normal invocation, or what the result shape/error behavior looks like beyond host, scheme, and HTTP status.

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 input schema already documents each parameter. The tool description adds little beyond associating the tool with a URL; it does not clarify how the other optional parameters affect the output. With high schema coverage, the baseline 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 first sentence uses a concrete verb and names specific outputs: host, scheme, and HTTP status for a URL. It is clear what the tool does, but it does not explain the 'citation' name or distinguish itself from sibling tools like fetch-status or normalize-url.

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?

No guidance is given about when to prefer this tool over alternatives, and no exclusion criteria are stated. The description also does not address how the 8 other optional parameters relate to the described URL behavior, leaving an agent without enough direction for selecting or populating this tool.

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