Tavily Web Search MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions searching the web but doesn't disclose traits like rate limits, authentication needs, result format, or potential side effects (e.g., network usage). This is a significant gap for a tool that interacts with external resources.

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 with zero waste, front-loaded with the core action. It's appropriately sized for a simple tool, making it easy to parse without unnecessary details.

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 complexity of web searching (external interaction, no annotations, no output schema, and 0% schema coverage), the description is incomplete. It lacks details on behavior, results, error handling, or constraints, making it inadequate for an agent to use the tool effectively without additional context.

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 schema description coverage is 0%, and the description adds minimal meaning beyond the schema. It implies the 'query' parameter is used for web searches but doesn't explain its semantics, such as expected format, length constraints, or how it influences results. This fails to compensate for the lack of schema documentation.

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 with a specific verb ('Search') and resource ('the web'), making it immediately understandable. However, it doesn't differentiate from sibling tools like 'generate_qr_code' or 'roll_dice', which are unrelated, so it doesn't need sibling differentiation but could be more specific about what kind of web search it performs.

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 or in what context. It simply states what it does without mentioning prerequisites, limitations, or scenarios where other tools might be more appropriate, leaving the agent to infer usage.

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