Catalog_ChangeCustomColumnExpression

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

No annotations exist, and the description provides no behavioral information such as side effects, prerequisites, idempotency, or error states. 'Change' implies mutation, but nothing about reversibility or required permissions is disclosed.

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?

Extremely short, but this is under-specification rather than conciseness. The description lacks crucial details and fails to earn its place.

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?

Given the complexity of the tool (requires specifying which custom column and the new expression), the description is completely inadequate. It does not mention required identifiers or provide any context for using nested object parameters.

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 100% with one parameter 'body' described as 'Request body', but this adds no meaning. The tool description does not explain what fields the body should contain or provide any context beyond schema. Baseline is 3 but no additional value is added.

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 'Change custom column expression' states a verb and a resource, but it is vague. It does not clarify whether 'change' means update, modify, or replace, and it fails to distinguish from sibling tools like Catalog_SaveCustomColumn, which might also modify custom columns.

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?

No guidance is provided on when to use this tool over alternatives. With many sibling tools dealing with custom columns (e.g., Catalog_GetCustomColumnExpression, Catalog_SaveCustomColumn, Catalog_DeleteCustomColumn), the description offers no context for selection.

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