SerpMCP

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

No annotations are provided, so the description carries the full burden. It discloses that the tool returns a 'complete usage guide' with detailed information, which implies it's a read-only informational resource. However, it doesn't mention behavioral traits like rate limits, authentication needs, or potential side effects. The description adds some context but lacks comprehensive behavioral details.

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 appropriately sized with three sentences that are front-loaded: it starts with the main purpose, elaborates on content, and specifies the return. Each sentence adds value without redundancy. Minor improvements could include tighter phrasing, but overall it's efficient.

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 tool's low complexity (0 parameters, no annotations) and the presence of an output schema, the description is reasonably complete. It explains what the tool does and what it returns, though it could benefit from more usage context. The output schema likely covers return values, reducing the need for detailed output explanation in the description.

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 0 parameters with 100% coverage, so no parameter documentation is needed. The description doesn't add parameter semantics beyond the schema, but since there are no parameters, this is acceptable. Baseline for 0 parameters is 4, as the description needn't compensate for any gaps.

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 tool's purpose: 'Get a comprehensive guide for using the Google SERP tools.' It specifies the verb ('Get') and resource ('guide'), though it doesn't explicitly differentiate from sibling tools like serp_list_search_types or serp_list_countries that might also provide informational content. The purpose is clear but lacks sibling distinction.

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 provides no guidance on when to use this tool versus alternatives. It mentions the guide includes 'parameters, examples, and best practices' but doesn't specify scenarios where this guide is needed over direct tool usage or other informational tools. There's no explicit when/when-not or alternative references.

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