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

Annotations already declare destructiveHint=false and openWorldHint=true; the description reinforces this with 'Rein additiv, kein Risiko für bestehende Daten', which usefully clarifies existing data is untouched. However it says nothing about the backup being asynchronous or how/when to confirm completion (get_backup_status and get_wordpress_backups exist as siblings), which is the key behavioral fact for a create-backup 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?

One dense sentence with the action front-loaded, then the motivating scenario, then the conditional requirement. Efficient, though the em-dash clause stacks three ideas into a single sentence.

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 no output schema and only 2 well-documented params, the description covers the action, safety and the site_url edge case. It omits that the backup runs asynchronously and how to verify or restore it, which are relevant for an agent completing the task end-to-end.

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%, so the baseline is 3. The description only lightly extends the schema by noting the multi-install case relates to subdomains on the same domain, adding marginal nuance over the existing site_url description.

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 (erstellt), resource (On-Demand-WordPress-Backup) and mechanism (über WP Toolkit), which cleanly separates it from get_wordpress_backups, delete_wordpress_backup and restore_wordpress_backup. An agent can route to this tool without opening its 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?

Gives a concrete when-to-use scenario ('als Absicherung vor einem riskanten Plugin-Update') and a precondition for site_url (multiple WP installs on the same domain). It does not name sibling alternatives such as get_backup_status for verifying completion, so it stops short of full when-to-use/when-not coverage.

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