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SalehKhatri

postman-mcp

by SalehKhatri

create_collection

Create a new Postman collection in a specified workspace by providing its name, description, and workspace ID.

Instructions

Create a new collection

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesThe name of the collection
descriptionYesThe description of the collection
workspaceIdYesThe ID of the workspace
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral transparency. It merely states the creation action without disclosing side effects, permission requirements, whether the operation is reversible, or what the response contains. For a mutation tool, 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, concise sentence with no unnecessary words. It front-loads the verb and resource, making it immediately clear what the tool does. All tokens earn their place.

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 simple create operation with no output schema and no annotations, the description is insufficiently complete. It does not explain what happens after creation, whether any preconditions exist (e.g., workspace existence), or what the return value looks like. The schema covers parameters, but the description does not provide the broader context an agent needs to invoke the tool confidently.

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 input schema provides 100% coverage with descriptions for all three parameters (name, description, workspaceId). The description itself adds no additional parameter semantics, but the schema already documents the parameters adequately, so the baseline score of 3 is appropriate.

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 'Create a new collection' uses a specific verb ('create') and resource ('collection'), clearly distinguishing it from sibling tools like update_collection, delete_collection, and list_collections. There is no ambiguity about what action is performed.

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. There is no mention of prerequisites (e.g., that the workspaceId must reference an existing workspace) or exclusions (e.g., that this tool does not modify existing collections). This is a minimal restatement of the tool's name.

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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