add_segment_rule_group

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

Without annotations, the description carries the full burden. It states 'Add', implying mutation, but does not disclose whether the operation is idempotent, whether it requires authentication, or what happens to existing rules on the segment. The minimal description lacks behavioral context.

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, clear sentence with no redundancy. It conveys the core purpose efficiently. However, it lacks structural cues like bullet points or explicit front-loading of key information beyond the verb-object pair.

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 tool's simplicity (2 required params, no output schema), the description is minimally adequate. It does not explain return values or potential errors, but for a straightforward add operation, it provides the essential purpose. More detail would improve completeness.

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 100%, so the schema already explains the parameters. The description adds that 'rule_group' is 'a single rule group object', which provides slight extra context (not an array). However, it doesn't detail the JSON structure or format, leaving the agent to infer.

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 'Add a rule group to an existing segment' clearly states the action (add) and the resource (rule group to segment). It distinguishes from sibling tools like 'clear_segment_rules' and 'update_segment', which deal with rules differently.

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 provides no guidance on when to use this tool versus alternatives such as 'clear_segment_rules' or 'update_segment'. An agent would not know if this appends to existing rules or overwrites them, nor when to choose this over other rule-related tools.

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