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

Annotations already declare the safety profile (not read-only, not open-world, not destructive, not idempotent), so the bar is lower. The description adds real context beyond that: the starter is organization-scoped and is built from 'portable rule definitions'. It still omits behavior on name collisions, whether the starter is reusable elsewhere, and the meaning of the idempotency_key parameter.

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; the verb and resource lead. It is efficient but so terse that terseness shades into under-specification rather than disciplined brevity.

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 write tool with four parameters, 0% schema description coverage, and no output schema, one sentence is not enough. It says nothing about request_id/idempotency_key, conflict handling, or what the created starter's identity/return looks like, so an agent calling it correctly is largely guessing.

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 carries the burden and only partially meets it: 'named' maps to name and 'portable rule definitions' maps to rules. The request_id and idempotency_key parameters are undocumented in both the schema and the description, leaving half the parameters opaque.

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?

States a specific verb (Create), resource (organization starter), and input source (portable rule definitions), which clearly separates it from the read/list/delete/rename starter siblings. It does not, however, distinguish itself from automation_rules_create or automation_starters_apply/save_job, so the agent must infer which of the create-family tools it wants.

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 when-to-use guidance, no prerequisites, and no mention of the alternatives (starters_apply, starters_preview, automation_rules_create) that share this name prefix. The agent gets no signal about when creating a starter is the right move versus saving or applying one.

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