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Prowlarr MCP server

by rollecode

create_applications_action_by_name

Idempotent

Create a Prowlarr application by submitting an action name and configuration body, enabling automated setup of download client integrations through the API.

Instructions

Create Application.

POST /api/v1/applications/action/{name}

Args: name: Path parameter. body: Request payload. Read the matching GET or the /schema endpoint first to see the fields this resource expects.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bodyYes
nameYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.4/5.0
Behavior3/5

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

Annotations already provide idempotentHint=true, readOnlyHint=false, and destructiveHint=false. The description adds some useful context by exposing the HTTP endpoint and instructing agents to consult GET or /schema for expected fields, which helps with dynamic payload discovery. However, it does not clarify what the 'action' actually does or what side effects result.

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

Conciseness4/5

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

The description is compact and well-structured: a one-line purpose, the endpoint, and an args breakdown. There is no redundant filler or repetition of the schema. It is too sparse, but the conciseness itself is appropriate for the limited information provided.

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?

Despite having only two parameters and an output schema, the description is not complete enough for correct invocation. It fails to explain the action-by-name concept, the role of the name parameter, or how this operation relates to the broader applications API. The external reference to GET/schema is helpful but does not compensate for the missing semantic context.

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

Parameters2/5

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

Schema coverage is 0%, so the description carries the burden of explaining parameters. It states that name is a path parameter and body is a request payload, but it does not explain what name refers to or what the action does. Pointing to GET or /schema helps for body discovery, but the meaning of the key name parameter remains unexplained.

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 Application,' which states a verb and resource, but it omits the critical 'action/{name}' semantics from the tool and path. This makes it ambiguous whether it creates an application or executes/creates an action on an application, and it does not distinguish it from sibling create_applications.

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?

No guidance is given for when to use this tool versus alternatives like create_applications or other create_*_action_by_name tools. The only advice is to read the matching GET or /schema endpoint first, which is a prerequisite for building the payload, not a tool-selection guideline.

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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