twilize

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

With no annotations, the description carries full burden but only states the action without behavioral details. It does not disclose if this is a mutation (likely, given 'add'), permission requirements, side effects (e.g., altering datasource structure), or response behavior (though an output schema exists), leaving significant gaps in transparency.

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, efficient sentence with no wasted words, making it front-loaded and easy to parse. However, it is overly terse given the tool's complexity (6 parameters, mutation action), bordering on under-specification rather than optimal conciseness.

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 mutation tool with 6 parameters, 0% schema coverage, no annotations, and sibling tools, the description is incomplete. It lacks usage context, parameter explanations, behavioral traits, and differentiation from siblings, though the presence of an output schema slightly mitigates the need to describe return values.

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 must compensate but adds no parameter information. It does not explain what 'field_name', 'formula', or other parameters mean, their formats, or examples (e.g., formula syntax), failing to provide semantic context beyond the bare 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 states the action ('Add a calculated field') and target ('to the datasource'), which provides a basic purpose. However, it lacks specificity about what a 'calculated field' entails (e.g., derived from existing data) and does not differentiate from sibling tools like 'add_parameter' or 'add_reference_line', making it vague in context.

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 versus alternatives. It does not mention prerequisites (e.g., needing an existing datasource), exclusions, or comparisons to siblings like 'remove_calculated_field' or 'list_fields', leaving the agent without contextual usage cues.

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