Serpstat MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'Get' implies a read-only operation, it doesn't address critical aspects like rate limits, authentication requirements, data freshness, or error handling. For a tool that likely queries external SEO databases, this lack of behavioral context is a significant gap.

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 a single, efficient sentence that front-loads the core purpose. Every word earns its place: 'Get' (action), 'comprehensive SEO information' (scope), 'multiple domains' (target), and the four specific data types. There's no wasted verbiage or redundant information.

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 moderate complexity (3 parameters, no output schema, no annotations), the description is minimally adequate. It tells what the tool does but lacks context about when to use it, behavioral constraints, or output format. For a tool that likely returns rich SEO data, the description should provide more guidance about the nature and structure of returned information.

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 schema fully documents all parameters. The description adds no parameter-specific semantics beyond what's in the schema. It mentions 'multiple domains' which aligns with the 'domains' parameter, but provides no additional context about the 'se' or 'filters' parameters. Baseline 3 is appropriate when the schema does all the work.

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 comprehensive SEO information for multiple domains including visibility, keywords, traffic, and dynamics.' It specifies the verb ('Get'), resource ('multiple domains'), and scope of information. However, it doesn't explicitly differentiate from sibling tools like 'get_domain_keywords' or 'get_domain_competitors' that might provide overlapping or related SEO 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 provides no guidance on when to use this tool versus alternatives. With many sibling tools focused on specific SEO aspects (e.g., 'get_domain_keywords', 'get_backlinks_summary'), there's no indication of when this comprehensive tool is preferred over more targeted ones. It mentions 'multiple domains' but doesn't specify prerequisites or exclusions.

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