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rehan1020

mcp-india-stack

by rehan1020

lookup_pincode

Read-onlyIdempotent

Retrieve all post offices for a given India pincode to normalize addresses, extract district/state, or perform GST state crosswalks.

Instructions

Look up India pincode details and return all post offices for that code.

Use for address normalization, district/state extraction, and GST state crosswalk use-cases.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pincodeYes6-digit pincode

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior4/5

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

Annotations already declare read-only and idempotent. Description adds that it returns all post offices, providing output context without contradicting annotations.

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?

Two concise sentences: function statement then use cases. No redundant or filler content.

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

Completeness5/5

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

With output schema present, description adequately covers input and use cases. Mentions return of post offices, sufficient for a straightforward lookup 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 covers parameter completely with description '6-digit pincode' and length constraints. Description adds no extra semantics beyond reinforcing 'pincode' role.

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 specifies verb 'look up', resource 'India pincode details', and outcome 'return all post offices'. Clearly distinguishes from sibling validation/lookup tools by focusing on pincodes.

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?

Explicitly lists use cases (address normalization, district/state extraction, GST crosswalk). No explicit when-not-to-use, but use cases sufficiently guide agent.

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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