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awslabs
by awslabs

list_mapping_collections

List loaded OSCAL Mapping Collections with summary metadata, supporting offset and limit for paginated access.

Instructions

List loaded OSCAL Mapping Collections with summary metadata.

Args: ctx: MCP server context (injected automatically). offset: Zero-based pagination offset (default 0). limit: Maximum items to return, 1-100 (default 10).

Returns: Page_Response dict with keys: items, total, offset, limit, hasMore.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
offsetNo
limitNo
Behavior2/5

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

No annotations provided, and the description only mentions pagination and return format. It does not disclose whether the operation is read-only, destructive, requires authentication, or has rate limits. For a tool with no annotations, the description carries the full burden and falls short.

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 concise and well-structured with Args and Returns sections. It front-loads the purpose and provides necessary details without unnecessary verbosity. The injected context parameter is appropriately mentioned.

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

Completeness3/5

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

For a simple paginated list tool with two parameters and no output schema, the description provides purpose, parameters, and return format. However, it lacks details on what 'loaded' means, what summary metadata includes, and any filtering capabilities. It is adequate but not fully complete.

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?

Input schema has 0% description coverage, but the description explains both parameters: offset (0-based pagination) and limit (1-100, default 10). This adds meaning beyond the schema, compensating for the lack of property descriptions.

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?

Clearly states it lists OSCAL Mapping Collections with summary metadata. Name and description align, and sibling tools like list_mapping_collection_mappings and query_mapping_collection differentiate it.

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 on when to use this tool versus alternatives like query_mapping_collection or text_search_oscal. The description does not provide context for when listing is appropriate.

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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