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Radarr MCP server

by rollecode

create_queue_grab_by_id

Idempotent

Initiate downloading a specific queue item by providing its ID, triggering a grab action.

Instructions

Create QueueAction.

POST /api/v3/queue/grab/{id}

Args: id: Path parameter.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

D1.6/5.0
Behavior2/5

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

Annotations already convey readOnlyHint=false, destructiveHint=false, and idempotentHint=true. The description adds no further behavior: it doesn't disclose side effects on the queue (e.g., state changes), prerequisites, or consequences. With annotations present, the bar is lowered but the description still contributes almost nothing beyond them.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness2/5

Is the description appropriately sized, front-loaded, and free of redundancy?

While short, the description is under-specified. It repeats the endpoint and parameter without adding value. Every sentence is redundant with the name or schema, so it does not earn its place. This is not concise; it is sparse and unhelpful.

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

Completeness1/5

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

For a tool that performs an action on a queue item, the description is severely incomplete. It omits what 'grab' does, when to use it, and how it differs from bulk operations. Even with an output schema present, an agent cannot understand the operation's purpose or effect from this definition.

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

Parameters1/5

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

Schema description coverage is 0%, so the description must compensate, but it merely says 'id: Path parameter' which duplicates the endpoint and schema. It provides no additional meaning about the ID, its format, or its role in grabbing. The baseline for low coverage is a failed compensation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose2/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description says 'Create QueueAction' which is a generic verb+resource but doesn't explain what a QueueAction is or what 'grab' means. It restates the endpoint and parameter but adds no semantic distinction from sibling tools like create_queue_grab_bulk. The purpose is only as clear as the name already is.

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

Usage Guidelines1/5

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

No guidance is given on when to use this tool vs alternatives. There is no mention of when to grab a queue item, what the action does, or that a bulk variant exists. The description provides zero context for selection.

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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