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audiobookshelf-mcp

audiobookshelf-mcp

by ni-c
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

Get library

get_library
Read-onlyIdempotent

Fetch a specific library's folders, scanner settings, and metadata. Choose compact for essential fields or full for raw Audiobookshelf data.

Instructions

Fetches a single library including its folders and scanner settings.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "library_id": "<library_id>"
    },
    "name": "get_library"
  }
}

Input Schema

NameRequiredDescriptionDefault
detailNo"compact" (default) returns a projection with the fields that matter for browsing; "full" returns the raw Audiobookshelf object including audio files, tracks and chapters, which is very large.
library_idYesLibrary id, as returned by list_libraries

Output Schema

NameRequiredDescriptionDefault
truncatedNoPresent only when the answer was shortened to fit the budget.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv0.4.0
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • addedInput schema / properties / library_id / maxLength
      Added value: +128
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": true,
+  "properties": {
+    "truncated": {
+      "additionalProperties": false,
+      "description": "Present only when the answer was shortened to fit the budget.",
+      "properties": {
+        "dropped_entries": {
+          "additionalProperties": {
+            "type": "number"
+          },
+          "propertyNames": {
+            "type": "string"
+          },
+          "type": "object"
+        },
+        "follow_up": {
+          "type": "string"
+        },
+        "reason": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "reason",
+        "dropped_entries",
+        "follow_up"
+      ],
+      "type": "object"
+    }
+  },
+  "type": "object"
+}
  2. First observedv0.1.1

TDQS

A4.1/5.0
Behavior3/5

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

The annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the bar for additional transparency is lower. The description's 'Fetches' aligns with these annotations but adds no extra context about side effects, authentication, or rate limits, so a neutral score is appropriate.

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 that directly states the action and scope without any fluff or redundancy. It is optimally structured and front-loaded with the core purpose.

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?

The tool has an output schema, so return values are already documented. The description sufficiently covers what the tool does and what it includes, making it complete for the given context. No additional context is needed.

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 schema descriptions fully cover both parameters (library_id and detail) with clear explanations and enum values, so schema coverage is 100%. The tool description adds no additional meaning beyond what the schema already provides, hence the baseline score.

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 clearly states a specific verb ('Fetches') and resource ('a single library'), and specifies what is included ('folders and scanner settings'). This distinguishes it from sibling tools like list_libraries (plural), get_library_stats, and get_library_filter_data.

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?

The description gives clear context for when to use this tool (to fetch a single library with its folders and scanner settings) but does not explicitly name alternatives or state when not to use it. This is clear but lacks explicit exclusions.

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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