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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the tool is known to be safe and side-effect-free. The description adds no contradictory behavior and enriches the context by listing the types of data covered, which helps the agent anticipate the response shape. Without additional behavioral quirks (auth, rate limits, pagination), the description does what's needed, so a 4 is justified.

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?

Two sentences, no fluff. The first sentence lists the content domains in comma-separated format, and the second gives a crisp usage directive. Every word earns its place; the description is front-loaded with the most important information and avoids redundant phrasing.

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 tool with no parameters and no output schema, the description fully covers what an agent needs to know: what the tool returns and when to call it. It doesn't leave gaps about missing parameters or side effects, and the content list is sufficiently comprehensive to set expectations. Nothing is absent that would prevent correct invocation.

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 has zero parameters, so there is nothing to document. With a baseline of 4 for parameter-less tools, and because the description doesn't need to compensate for any schema gaps, this score is appropriate. No additional parameter information could be added in the description.

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 resource ('company information for Everstake') and enumerates the specific content areas (overview, metrics, certifications, products, clients, contact details). It distinguishes itself from sibling tools that target a single dimension by positioning itself as the comprehensive aggregate, so an agent can tell it apart without reading each sibling's schema.

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 provides an explicit condition: 'Use when users need comprehensive facts about Everstake as a company.' This tells when to select this tool over more specialized siblings. It doesn't explicitly mention when not to use it or name alternatives, but the condition is clear enough for an agent to route correctly. A 4 is appropriate since no exclusions or alternative names are given, but the context is solid.

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