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letoribo

mcp-graphql-enhanced

query-graphql

Run a GraphQL query across all nodes in a federated system with variable and header support.

Instructions

Execute a GraphQL query across all nodes in the federated system

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
queryYesThe GraphQL query or mutation string
variablesNoJSON string of variables
headersNoJSON string of extra headers
Behavior2/5

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

No annotations provided; description does not disclose side effects. It mentions 'across all nodes' but fails to state that mutations can be executed (since query parameter accepts mutations) or any behavioral traits like authentication needs or 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.

Conciseness5/5

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

Single sentence, direct and efficient with no wasted words. Front-loaded with purpose.

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

Completeness2/5

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

Given no annotations, no output schema, and the tool's ability to execute potentially destructive mutations, the description is too sparse. It fails to explain return format, error handling, or that mutations are possible, leaving significant gaps for safe use.

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?

Schema description coverage is 100% with each parameter already described (e.g., 'JSON string of variables'). Description adds no extra meaning beyond schema, so baseline 3 applies.

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?

Description uses specific verb 'Execute' and resource 'GraphQL query', and defines scope 'across all nodes in the federated system', clearly distinguishing from sibling tool 'introspect-schema' which handles schema introspection.

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

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit when-to-use or when-not-to-use guidance. While the tool name and sibling suggest usage for querying vs introspection, the description lacks direct statements about appropriate contexts or alternatives.

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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