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sondang91

Postman MCP Server

by sondang91

create_request

Create new API requests in Postman collections by specifying method, URL, headers, and body to organize and document API endpoints.

Instructions

Create a new API request in a Postman collection

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
collectionIdYesPostman collection ID (UID) where to add the request
nameYesRequest name (e.g., 'Get User by ID')
methodYesHTTP method
urlYesFull URL or path (e.g., 'https://api.example.com/users/{id}' or '/api/v1/users/{id}')
headersNoHTTP headers as key-value pairs
bodyNoRequest body (for POST/PUT/PATCH)
descriptionNoRequest description/documentation
folderIdNoOptional: Folder ID to organize requests. If provided, request will be created in this folder.
folderNameNoOptional: Folder name to organize requests. Will auto-find folderId. Takes precedence over folderId if both provided.
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Create' implies a write operation, it doesn't address permissions needed, whether the operation is idempotent, what happens on duplicate names, or what the response looks like. For a creation tool with 9 parameters and no annotation coverage, this leaves significant behavioral gaps.

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, efficient sentence that states exactly what the tool does with zero wasted words. It's appropriately sized for a creation tool and front-loads the essential information without unnecessary elaboration.

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?

For a creation tool with 9 parameters, no annotations, and no output schema, the description is insufficient. It doesn't explain what happens after creation, error handling, or behavioral constraints. While the schema documents parameters well, the overall context for using this tool remains incomplete for an AI agent.

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%, so all parameters are documented in the schema itself. The description doesn't add any parameter-specific information beyond what's already in the schema descriptions. This meets the baseline expectation when schema coverage is complete.

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 ('Create a new API request') and resource ('in a Postman collection'), distinguishing it from siblings like create_collection or create_folder. It uses precise terminology that leaves no ambiguity about what the tool does.

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 update_request or delete_request. There's no mention of prerequisites (e.g., needing an existing collection), error conditions, or typical use cases. The agent must infer usage from the tool name alone.

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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