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SalehKhatri

postman-mcp

by SalehKhatri

update_request

Update an existing request in a Postman collection by supplying the collection UID, the request's current name, and the changes to apply, such as URL, method, headers, body, or description.

Instructions

Update an existing request in a collection

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
updatesYesFields to update
requestNameYesCurrent name of the request to update
collectionUidYesThe UID of the collection
Behavior2/5

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It only states the operation without detailing mutation effects, partial update semantics, error handling, or required permissions. For a write operation, this is a significant gap.

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, front-loaded sentence that efficiently conveys the core purpose. There is no wasted content or redundancy.

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?

With three parameters including a nested 'updates' object and no output schema, the description is minimal. It explains the primary action but omits behavioral details such as return values or error scenarios. It is adequate but has clear gaps for a mutation tool.

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%, and the description adds no additional parameter semantics beyond what the schema already provides. The baseline of 3 is appropriate because the schema fully documents collectionUid, requestName, and updates.

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 ('Update') and the resource ('an existing request in a collection'), which distinguishes it from siblings like add_request and delete_request. It is specific and unambiguous.

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 phrase 'existing request' provides clear context that this tool is for modifying already-created requests, implicitly differentiating it from add_request. However, it does not explicitly mention when not to use it or name alternatives, so it falls short of a 5.

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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