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describe_operations

Get the full argument schema for operations found via find_operations.

Returns each operation's description and JSON-Schema arguments — everything a listed tool would have shown you.

include_output_schema is the ONLY way to obtain an operation's result shape: tools/list publishes no output schema for any operation, listed or not (they are 67 % of the payload, and a schema describing a result is not what you need to choose a tool). Ask for it when you must know the shape in advance; the result itself comes back as JSON either way, so usually you do not.

Up to 10 operations per call; anything beyond that is reported in omitted rather than dropped.

Input Schema

NameRequiredDescriptionDefault
namesYes
include_output_schemaNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A4.1/5.0
Behavior4/5

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

With no annotations, the description carries the burden well: it discloses the return contents (description + JSON-Schema arguments), the effect of include_output_schema, the 10-operations-per-call cap, and that overflow is surfaced in 'omitted' rather than dropped. It does not state auth requirements or explicitly that the call is read-only, but the retrieval framing makes the safety profile self-evident.

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 core action is front-loaded in the first sentence, and the limit/omitted behavior closes cleanly. The middle paragraph on include_output_schema is somewhat verbose, with an opinionated parenthetical about payload composition, but it remains informative rather than padding.

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

Completeness4/5

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

There is no output schema, yet the description explains what comes back (description, arguments, or result shape when requested, plus 'omitted'). Combined with the disclosed batch limit, this is nearly complete for a discovery meta-tool; only auth and error behavior are unaddressed.

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?

Schema description coverage is 0%, so the description must compensate. It gives meaningful semantics for include_output_schema (the only route to a result shape, and when to request it) but leaves 'names' to inference — the reader must deduce these are operation identifiers from find_operations. Half the parameters are covered, half are not.

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 first sentence states a specific verb and resource ('Get the full argument schema for operations') and scopes it to operations 'found via find_operations'. It clearly differentiates itself from the sibling find_operations (which lists) and from call_operation (which invokes), so an agent can route correctly without opening any schema.

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?

It gives explicit guidance for the optional parameter ('Ask for it when you must know the shape in advance... usually you do not') and ties its use to find_operations as the discovery prerequisite. It stops short of stating when NOT to use this tool (e.g., when the operation is already a listed tool) and doesn't address error/auth preconditions.

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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