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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds the important nuance that the tool doubles as a read-only getter when the field is omitted — behavior the annotations alone would misrepresent. It does not mention permissions or what a read returns, so it stays at a solid 3.

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 short sentences, zero filler, with the read/write duality front-loaded. The phrase 'the field' is mildly ambiguous given two parameters exist, which keeps it from a 5.

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 only two fully documented params, no output schema, and rich annotations, the description has little burden. Still, it never says what a read returns or how this relates to the broader notification-preferences surface implied by its name, leaving a small but real gap for an agent deciding whether this tool covers its need.

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 100%, so baseline is 3, but the description goes beyond the schema by defining the semantics of omission: leaving out the toggle means read-only mode rather than 'no change'. That is real added meaning for a boolean optional parameter. It says nothing extra about organizationId, hence not a 5.

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 dual action (read or change) on a specific resource (in-app tips and prompts). It is clear enough to act on, though the scope wording drifts from the tool name/title ('notification preferences'), leaving some doubt about whether other notification settings are covered.

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?

It gives one concrete usage rule — omit the field to perform a read — which is genuinely useful for a dual-mode tool. However, it offers no context on when to reach for this tool versus adjacent config tools (update_profile, update_referral_ui_state, update_workspace) and no prerequisites beyond what the schema states.

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