call_tool

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

No annotations are provided, so the description must carry the behavioral disclosure burden. It does usefully disclose that provider charges may apply and that the provider key is used for authentication, but it does not address potential side effects, failure modes, or rate limits. This is adequate but not comprehensive for a tool that executes arbitrary endpoints.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short sentences with no filler. The core action is front-loaded, and the cost warning is relevant and earns its place. The structure is appropriately tight given the tool's simplicity.

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

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

For a tool with no annotations and a low-detail schema description, the description leaves key context missing: how endpoint_id relates to the discovery flow, what 'args' should contain, and when this tool is appropriate relative to siblings. An output schema exists, so return values are somewhat covered, but the invocation context is under-specified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description needed to compensate. It does not explain that 'endpoint_id' identifies a previously discovered endpoint or that 'args' contains the endpoint-specific arguments. The parameter names are somewhat self-evident, but the description adds almost no semantic value beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb ('Execute'), a clear resource ('discovered endpoint'), and mentions the provider key. It is distinguishable from the sibling tools like find_tool and endpoint, though it does not explicitly contrast itself with them.

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

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

There is no guidance on when to use this tool versus alternatives, and no mention of prerequisites such as first using the 'endpoint' or 'find_tool' sibling to discover an endpoint. The phrase 'discovered endpoint' implies a prerequisite but does not state it explicitly.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.