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

Annotations already declare destructiveHint=true, so the safety profile is covered, yet the description adds the substantive consequences the annotation cannot convey: loss of reachability for bookmarks/cards/signatures/backlinks, loss of email reception when forwarding is enabled, staging copies being irreversible, and the response semantics (explicit confirmation of removal, 'unverified' instead of success if the list is unreadable, and the trap that an already-unreadable list does NOT prove absence). This is unusually rich disclosure.

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?

Dense but front-loaded: the action, the alternative, the required inputs, then the consequences, then the response behavior. Every sentence carries operational information, though the run length is longer than strictly necessary for an MCP description.

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?

No output schema exists, and the description compensates by explaining what the response reports (confirmed removal vs. unverified, and why an unreadable list is not evidence of absence). Combined with the parameter and consequence coverage, an agent has everything needed to call this destructive tool responsibly.

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 baseline is 3, but the description adds real semantics beyond the schema: the target domain must be given WITH its hosting, and exactly one of redirect_id or source_domain must accompany it, both validated server-side against the current subscription's redirects so guessed or foreign values are rejected up front.

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 and resource ('Hebt EINE Domain-Weiterleitung auf') with explicit scope (exactly one redirect) and immediately distinguishes it from siblings redirect_domain and get_domain_redirects. An agent can tell what it does and what it is not 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?

Gives explicit when-to-use ('etwa wenn versehentlich die falsche Domain weitergeleitet wurde'), names the inverse alternative (redirect_domain to re-create) and the lookup alternative (get_domain_redirects for the id). Also states the exclusion: staging copies are rejected on principle.

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