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

Annotations already declare destructiveHint=true, readOnlyHint=false, and idempotentHint=false, so the mutation/risk profile is covered structurally. The description adds little beyond the read/write split and repeats that clientData fields live in the schema; it says nothing about permission requirements, what deletion removes, or irreversibility, which annotations only imply. Adequate but thin for a destructive tool.

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: purpose and resource first, field overview second, read routing last. No filler and nothing buried.

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 deeply nested payload with no output schema, the description correctly defers detail to the schema and notes that IDs/owner/timestamps are server-set, which prevents wasted effort. It could say more about delete semantics and permissions, but the essentials for correct invocation are present.

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 67%, so most fields are self-documented. The description groups clientData into meaningful categories (login credentials, widgetIDs, canAccess tabs, channels/integrations, org membership, permissions, notifications), which is a helpful orientation map but adds no constraint or format detail beyond the schema. Baseline 3 is appropriate.

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 set (create/update/delete) on a specific resource (whitelabel client accounts) and immediately disambiguates who these accounts are for (people who log into the client portal). It also names the sibling read tool, so an agent can separate it from clients_read without opening either 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?

The final sentence 'For reads use clients_read' explicitly routes the agent to the alternative for read operations. It does not spell out when to choose create vs. update vs. delete, though the action enum and required clientId guidance carry most of that. Clear context, no exhaustive exclusions.

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