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apache

openserverless-mcp

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by apache

action_invoke

Invoke an API action by specifying an endpoint and passing key=value parameters.

Instructions

Invoke an API action. Executes ops action invoke with the given endpoint and key=value parameters.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsNoKey=value pairs to pass as parameters (e.g. ['key1=value1', 'key2=value2'])
endpointYesThe endpoint path: 'package/action'
Behavior2/5

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

With no annotations, the description must disclose behavioral traits but only mentions execution via CLI. It does not indicate whether invocation is read-only or destructive, authentication needs, or side effects, leaving the agent uninformed.

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 a single sentence that is not verbose, but it could pack more relevant information without much expansion. It is efficient but lacks depth.

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?

The description is too terse for a tool with no output schema and no annotations. It fails to explain return values, synchronous vs asynchronous behavior, or error handling, leaving significant gaps for agent understanding.

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 coverage is 100% with descriptions for both parameters. The description adds minimal value beyond the schema, merely restating 'endpoint and key=value parameters' and referencing the CLI command, which slightly contextualizes the parameter types.

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 invokes an API action by executing the underlying command `ops action invoke`, distinguishing it from sibling tools like `action_new` or `action_add_*` which are about creating or adding resources.

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?

The description provides no guidance on when to use this tool versus alternatives or what prerequisites are needed. It only states what it does without any context for decision-making.

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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