serp_get_usage_guide

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

With no annotations, the description carries full behavioral burden. It discloses that the tool returns a guide with detailed information, which is adequate for a read-only informational tool. However, it does not mention any limitations (e.g., output length, rate limits).

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 brief and front-loaded with the purpose. It uses clear structure (overview, details, return description) without unnecessary words. Minor improvement possible by tightening the second paragraph.

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 zero parameters and the presence of an output schema, the description covers the essential purpose and content of the tool. It is complete enough for an agent to understand when to invoke this tool.

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 tool has no parameters, meeting the baseline of 4. The description adds value by describing the content of the output (parameters, examples, best practices), which goes beyond what the empty schema provides.

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 that the tool provides a comprehensive guide for using Google SERP tools, including parameters, examples, and best practices. This distinctly differentiates it from sibling tools that perform actual searches or list data.

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 that this guide should be consulted before using other SERP tools, but it does not explicitly state when to use it vs. alternatives. The context is clear, but exclusions or when-not-to-use guidance is missing.

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