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pagerduty-mcp

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by PagerDuty

get_extension_schema

Read-onlyIdempotent

Retrieve a specific extension schema's details by providing its ID to view its configuration.

Instructions

Get a specific extension schema by ID.

Args:
    schema_id: The ID of the extension schema to retrieve

Returns:
    Extension schema details

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
schema_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
idNoThe extension schema ID
keyNoMachine-friendly display label
urlNoThe webhook payload destination URL for this extension
typeNoThe object type (always extension_schema)
labelNoHuman-friendly display label
summaryNoA short-form summary of the extension schema
icon_urlNoURL for the small (18x18) logo
logo_urlNoURL for the large logo (75px high, max 300px wide)
guide_urlNoLink to the extension's support guide
send_typesNoThe PagerDuty incident event types that activate this extension
descriptionNoA long description of the extension
Behavior3/5

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint. The description adds 'Get' and return value indication but does not provide additional behavioral context such as authentication needs or rate limits. Minimal extra value beyond 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?

The description is extremely concise, with the primary action stated in the first line. Every sentence serves a purpose: the action, parameter explanation, and return indication. No wasted words.

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?

Given the tool's simplicity (1 parameter, no nested objects, output schema present), the description is complete. It covers what the tool does, what input it expects, and what it returns. The output schema handles return details.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The only parameter 'schema_id' has a clear description: 'The ID of the extension schema to retrieve.' This adds meaning beyond the schema's title 'Schema Id', compensating for the 0% schema description coverage. For a simple ID parameter, this is sufficient.

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 clearly states 'Get a specific extension schema by ID' with a specific verb and resource. This distinguishes it from sibling tool 'list_extension_schemas' which lists all schemas.

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

Usage Guidelines3/5

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

No explicit guidance on when to use this tool vs alternatives. The name and description imply it's for a single schema by ID, but there's no mention of when not to use it or comparisons with related tools like list_extension_schemas.

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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