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Fetch JSONPath MCP

by ackness

batch-fetch-json

Extract specific JSON data from multiple URLs using JSONPath patterns. Fetch each unique URL once and process requests concurrently to retrieve targeted content efficiently.

Instructions

Batch extract JSON content from multiple URLs with different extended JSONPath patterns. Supports all JSONPath extensions and optimizes by fetching each unique request only once. Executes requests concurrently for better performance. Supports different HTTP methods.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
requestsYesArray of request objects

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.0.0

TDQS

A3.9/5.0
Behavior3/5

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 effectively describes key behaviors: concurrent execution for performance, deduplication optimization, and support for multiple HTTP methods with request bodies. However, it lacks important details like error handling, timeout behavior, authentication requirements, or rate limits that would be needed for a complete behavioral picture.

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 efficiently structured with four focused sentences that each add value: states the core purpose, describes JSONPath support, explains performance optimizations, and notes HTTP method flexibility. There's zero wasted text, and the most important information (batch JSON extraction with JSONPath) appears first.

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

Completeness3/5

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

For a tool with no annotations and no output schema, the description provides good coverage of the core functionality but has significant gaps. It explains what the tool does and some behavioral aspects, but doesn't describe the return format, error responses, or important operational constraints. Given the complexity of batch HTTP operations with JSON processing, more completeness would be expected.

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?

With 100% schema description coverage, the schema already documents all parameters thoroughly. The description adds some context about JSONPath extensions and concurrent execution, but doesn't provide significant additional parameter semantics beyond what's in the schema. The baseline of 3 is appropriate when the schema does the heavy lifting.

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 specific action ('batch extract JSON content'), resource ('from multiple URLs'), and mechanism ('with different extended JSONPath patterns'). It distinguishes from sibling tools by specifying JSON extraction (vs. text extraction in batch-fetch-text) and batch processing (vs. single URL in fetch-json).

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

Usage Guidelines4/5

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

The description provides clear context for when to use this tool (batch JSON extraction with JSONPath patterns) and implicitly distinguishes from batch-fetch-text (JSON vs. text) and fetch-json (batch vs. single). However, it doesn't explicitly state when NOT to use it or name specific alternatives, missing the highest score criteria.

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