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

Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=false, so safety is covered structurally; the description adds real value by naming fields that are deliberately non-writable (billing, password, email) and by bounding the blast radius to the caller's own profile. It stops short of describing partial-update semantics (zero required params means unspecified fields are left untouched) or what the tool returns, which keeps it below 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?

Front-loaded with the action and the writable fields, followed by scope limits and alternatives — the right order for an agent scanning for eligibility. Slightly redundant at the tail: billing is declared non-writable in sentence two and then again as outside the server entirely, which costs a few words without adding information.

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 mutation tool with four optional parameters, a nested settings object and no output schema, the description covers scope, exclusions and non-writable fields adequately, and annotations carry the safety profile. The remaining gap is return behavior on success/partial failure, which matters given there is no output schema to fall back on.

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 the nested settings toggles are already fully documented field-by-field and the baseline would be 3. The description still adds meaning beyond the schema by grouping the parameters into profile fields vs. inbox/reporting/notification toggles and by stating which account attributes are intentionally excluded from the writable surface.

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 (update) and a precisely scoped resource (your own profile and notification preferences), then enumerates the writable field groups: name, language, inbox-manager/reporting/notification toggles. It also names the sibling tools it is not (linkedin_account_update, email_account_update, campaign_update), so an agent can disambiguate without opening any schema.

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?

Explicit about when to use it (own user profile only) and when not to: LinkedIn account settings, mailbox settings, campaign settings, billing, team management and tenant configuration are all declared out of scope, with the correct alternative tool named for each. The exclusion of password and email as non-writable is also stated up front.

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