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

With no annotations, the description must disclose behavioral traits, but it only mentions the order of attempts (primary then fallbacks). It does not explain error handling, side effects, termination conditions, or how results are returned, leaving significant behavioral ambiguity.

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 a single short sentence, but it is under-specified rather than genuinely concise. It omits crucial details that would be needed for the description to earn its place, making it more a placeholder than a useful specification.

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?

This tool has nested objects, two parameters, no annotations, and no output schema. The one-sentence description is completely inadequate to guide an agent on how to construct inputs, interpret results, or handle failures. It provides no context on return values or edge cases, making it insufficient for reliable invocation.

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 coverage is 0% and the parameters are nested objects. The description adds minimal meaning beyond the parameter names: it indicates that 'primary' is a tool and 'fallbacks' are tools, but it does not explain the structure of these objects, how to specify tool names or arguments, or the semantics of the fallback array.

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 states the tool tries a primary tool and then fallbacks, giving a basic sense of its behavior. However, it lacks specificity about what kind of tools are involved, how fallback selection works, and the scope of the operation, and it does not distinguish it from siblings like run_chain or workflow_stateful.

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. It does not mention any particular context, prerequisites, or exclusions. The description simply says what it does without indicating appropriate usage scenarios.

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