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Tavily Catalog

tavily.catalog
Read-onlyIdempotent

Retrieve a structured catalog of all tools, resources, and prompts available on the server.

Instructions

Return the structured server catalog that describes tools, resources, and prompts.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
ctxNoOptional FastMCP context.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
versionYes
package_nameYes
prompt_namesNo
profile_slugsNo
tool_namesNo
resource_urisNo
example_resource_urisNo
metaNo
Behavior4/5

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

Annotations already declare readOnlyHint and idempotentHint, and the description adds value by specifying what the catalog contains (tools, resources, prompts). No contradictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, well-structured sentence with no wasted words. It conveys the essential purpose efficiently.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity, optional parameter, and presence of an output schema, the description is sufficiently complete. It does not need to elaborate on return values.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The only parameter 'ctx' is fully described in the input schema (100% coverage). The description adds no additional meaning beyond what the schema provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Return') and the resource ('structured server catalog'), and the scope ('describes tools, resources, and prompts') differentiates it from sibling tools like crawl, extract, or research.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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 like the other tavily tools. It does not mention when not to use it or offer any usage context.

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

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