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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=true). The description adds genuinely useful behavior beyond that: the password is securely randomly generated and returned in the response, and the user is bound to an existing database. It stops short of stating permission requirements or idempotency/duplicate-user behavior.

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 tightly written sentences with no filler, and the core action is front-loaded ahead of the password-generation behavior. Nothing needs trimming.

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 3-param mutation tool with no output schema, the description supplies the key missing return-value context (the generated password appears in the response) and the DB prerequisite. Only permission/error-handling detail is absent, which is a minor gap given the rich schema.

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 100% and the schema itself is exceptionally detailed (login constraints, valid/invalid examples, the 32-char Plesk pitfall). The description adds no parameter-level meaning beyond the schema, so the baseline of 3 applies.

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 precise verb+resource: creates a new database user and links it to an existing database. This clearly distinguishes it from siblings like create_database and delete_database_user without ambiguity.

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?

Usage is only implied: 'verknüpft ihn mit einer bestehenden Datenbank' signals that an existing database is a prerequisite. There is no explicit when-to-use/when-not guidance or reference to alternatives, leaving the agent to infer the workflow context.

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