set_theme_data_colors

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

No annotations are provided, so the description must disclose safety and side effects, but it only states the operation and a prerequisite. It doesn't explain consequences of setting colors, validation behavior, or whether the change is reversible/overwrites existing palette.

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?

Two concise sentences, front-loaded with the primary purpose. The technical detail ('comma-separated hex') and prerequisite each earn their 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?

With no annotations and an undocumented reportSessionId parameter, the description leaves critical context gaps. While the tool is simple, a mutation tool should mention expected state, error behavior, or return value; it only notes the prior theme requirement.

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?

The schema covers 50% of parameters, and the description only restates the colors format already present in the schema. It provides no additional meaning for reportSessionId, which remains undocumented.

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?

Description clearly states 'Set the report theme's DATA COLOURS (the categorical palette)' – a specific verb+resource. It differentiates from sibling theme tools (structural, text, cf, sentiment colors) by explicitly naming the categorical palette scope.

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?

The description instructs to 'Run generate_theme / apply_report_theme first', providing a clear precondition for use. It doesn't explicitly contrast with alternative theme-color setters, but the context of data colours is clear.

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