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ars-system

MCP Credentials Broker

by ars-system

revoke_token

Stop unauthorized access by immediately invalidating a previously issued token, securing your OAuth2 credentials.

Instructions

Immediately revokes a previously issued token, making it invalid for any further use.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
token_idYesID of the token to revoke
Behavior3/5

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

Without annotations, the description carries the burden. It discloses the immediate effect and that the token becomes invalid, but does not mention whether revocation is irreversible, idempotent, or requires specific permissions. Some behavioral information is provided but gaps remain.

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, front-loaded sentence with no wasted words. It efficiently conveys the action and consequence.

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?

For a simple one-parameter tool with no output schema, the description covers the core purpose and effect. It lacks explicit usage guidelines and edge-case behavior, but is largely sufficient for an agent to understand the tool's role. Slightly above adequate.

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 single parameter token_id is fully documented in the schema with 100% coverage, so the description adds no additional semantic meaning beyond what the schema provides. Baseline 3 applies.

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 the tool's function: revoking a previously issued token. The verb 'revokes' is specific and the resource 'token' is explicit, distinguishing it from sibling tools like 'mint_token'.

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

Usage Guidelines3/5

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

The description implies the tool is used after a token has been issued ('previously issued token'), but does not explicitly state when to use it over alternatives or mention any prerequisites or exclusions. Usage context is implied rather than explicit.

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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