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

Beyond the readOnly/idempotent annotations, it discloses genuinely useful behavior: channel settings already resolve per-field overrides over account defaults, so the reader gets effective values rather than a merge to do itself. It also states that credentials and channel connection IDs are omitted from the result, which annotate the response shape in ways annotations cannot.

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 scope statement is front-loaded in the first sentence and each subsequent sentence adds a distinct fact about resolution or omission. 'Profile settings are not changed' partially restates readOnlyHint and is the one sentence that does not fully 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?

An output schema exists, so return values need not be explained, and the description supplies the necessary context about override resolution and excluded fields. For a zero-parameter read tool this is close to complete; only the sibling routing is missing.

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?

With zero parameters, the baseline is 4; there is nothing parameter-level to add or omit. The description correctly does not invent inputs and instead spends its words on output semantics.

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 and resource: reads account-wide and connected-channel editorial writing guidance, with anti-slop and content-structure settings named. This clearly distinguishes it from a generic profile read, though it does not explicitly contrast with the near-named sibling read_profile_settings, leaving the boundary implicit.

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 implies when the tool is applicable (when you need writing guidance rather than raw settings) but never states when to use it versus read_profile_settings, get_profile, or preview_profile_instruction_change. The agent must infer the routing from the field names alone.

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