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

Beyond the annotations (readOnly=false, destructive=false) it discloses the partial-patch mutation model, the required authorization scope, and a meaningful side-effect caveat that toggling email on does not bypass opt-in/confirmation or browser permission. It does not describe error behavior or whether unsetting a value is possible, which keeps it short of a 5.

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?

Three tight sentences, front-loaded with the mutation model, then schema, then prerequisites and the email caveat. No filler or restatement of the tool name.

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?

Output schema exists so return values need no explanation, and the description covers patch semantics, permissions and the email-opt-in trap for an 8-parameter mutation. Remaining gaps are the undocumented timezone/onSaleOverride fields and any note on validation of the HH:MM patterns.

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 coverage is 0%, so the description must carry parameter meaning. It groups most fields into recognizable concepts (channel toggles = emailEnabled/browserEnabled, quiet hours = quietStart/quietEnd, digest schedule = digestTime/weeklyDay) but never mentions timezone or onSaleOverride, leaving two of eight parameters unexplained anywhere.

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 ('Partially update the connected owner's channel toggles, quiet hours or digest schedule') and scopes it to the connected owner, which implicitly separates it from the read counterpart get_notification_settings. It stops short of naming any sibling explicitly, so differentiation relies on inference from the verb.

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?

Gives clear preconditions: alerts:write scope, an entitled owner, and the note that only supplied fields change so callers can patch a subset. It does not state when to prefer this over get_notification_settings or what to do on failure paths, but the usage context is unambiguous.

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