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

Annotations only tell us this is a non-read-only, non-destructive, non-open-world write. The description adds real behavioral context the annotations cannot convey: the entry only appears after operator review, and name/location/services become publicly visible. It stops short of describing what happens on rejection or whether re-submission is possible.

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 compact sentences, front-loaded with the action and eligibility, followed by the review/publishing behavior and the data-placement warning. No filler, though the dash-clause about public fields is dense and slightly compressed.

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?

With six required parameters, no output schema, and a moderation step, the description covers the essentials: eligibility, review-gated visibility, and where contact data belongs. It does not state what the call returns or how the pending state is represented, which is the remaining gap.

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 already 100%, so the baseline is 3. The description earns above baseline by explaining a semantic constraint the schema does not encode: which fields become public and that phone, e-mail, street address and links must not be placed in name/location/services, only in contact.

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 ('Anmeldung als Anbieter') plus an eligibility constraint (nur Volljährige), so an agent immediately knows this creates a provider registration. It does not, however, name or contrast itself with siblings such as contact_provider or submit_offer, so differentiation is left to inference.

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 implied: use this when someone wants to sign up as a service provider and is an adult. There is no explicit guidance on what to do for an already-registered provider, nor any named alternative tool for contacting or updating a provider, which leaves the routing decision partly to inference.

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