add_combined_set

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

No annotations are provided, so the description carries the full behavioral burden, and it is nearly silent. 'Union' and 'existing native sets' weakly imply that the input sets must already exist and that a new set is produced, but there is no mention of permissions, whether inputs are mutated, or error behavior when dimensions differ.

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?

A single front-loaded sentence with no filler, and the verb and constraint lead. It is efficient, though the brevity borders on under-specification for a two-parameter mutation tool.

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?

An output schema exists so return values need not be explained, but with no annotations, 0% parameter coverage, and a non-trivial set-combination operation, the description leaves too much unspecified for an agent to invoke it confidently.

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% and neither of the two parameters is documented in the schema. The description only faintly implies that 'set_names' refers to existing sets being unioned and that a resulting set is named, but it never clarifies the relationship between set_name and set_names, so it does not compensate for the coverage gap.

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 gives a specific verb ('Union') and resource ('existing native sets') and adds a scoping constraint ('at the same dimension grain') that separates it from a plain single-set creation. However, it never references the nearby sibling 'add_set' by name, so the agent must infer the distinction between adding one set versus combining several.

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 explicit when-to-use statement and no named alternative. The only implicit guidance is the 'same dimension grain' constraint, which tells the agent a precondition exists but not how to satisfy it or when to prefer 'add_set' or 'add_group' instead.

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