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

With no annotations, the description carries full responsibility and excels: it discloses the click-out URL, bind token, 24-hour openability, 1-hour free-tier session expiration, paid-account window, and instructs to present the URL as a clickable link.

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 well-organized with clear sections and no wasted words. It is slightly longer than strictly necessary (e.g., 'Speed Reader by Archerion.'), but every sentence provides 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?

Given the simple two-parameter schema and no output schema, the description covers all essential context: when to call, how to pass text, what the response is, and session/expiration behavior. Nothing critical is missing.

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's 'Pass the full text via the text argument' essentially restates the schema's parameter description and adds little semantic value beyond it.

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 opens with a specific verb and resource: 'Render a Speed Reader for the provided text,' and clarifies the RSVP speed-reading purpose. Even without siblings, it unambiguously defines the tool's functionality.

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?

A dedicated 'WHEN TO CALL' section lists trigger phrases such as 'speedread' and 'read fast', providing clear guidance. It does not mention when not to use the tool or alternatives, but no siblings exist, so the context is sufficiently clear.

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