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

Adds real behavior beyond the annotations: it discloses that cached calculations are cleared and recalculation is started, which explains the destructiveHint=true and non-idempotent consequences in user-facing terms. It also surfaces the confirmation prerequisite, though it doesn't say whether prior values are recoverable after the overwrite.

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 short sentences with zero padding: what changes, the precondition, then the side effect. The destructive consequence is front-loaded rather than buried, which is the right ordering for a write tool.

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 caching side effect plus confirmation gate are covered. Gaps remain for a destructive 8-parameter mutation: the relationship to save_my_birth_profile, whether optional coordinates/timezone are derived from birth_place, and whether omitted optional fields are nulled or preserved.

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% across 8 parameters, so the description must carry the burden; it names birth_date, birth_time, birth_place and the confirmed_profile_write gate, but says nothing about language, birth_latitude, birth_longitude, or birth_timezone. Half the parameters, including the coordinate/timezone fields that determine chart accuracy, are left undefined.

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 resource (the birth date, time, and place stored in the connected user's Vedara account), with a scope word ("complete") that signals full replacement rather than partial edit. It does not, however, distinguish itself from the sibling save_my_birth_profile, which reads as an overlapping write of the same fields.

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?

Provides one concrete gating rule: confirmed_profile_write must be true after confirming the exact details with the user, which tells the agent a user confirmation step is mandatory. It gives no guidance on when to use this instead of save_my_birth_profile, nor what to do when only some birth details need correcting.

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