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

Annotations only say readOnlyHint=true and destructiveHint=false. The description adds substantial behavioral context: content is from FlexEnergy, not self-researched; it must be attributed as 'Quelle: flexenergy.at'; the source_url value must be shown instead of raw input; and external URLs fail with a clear no-fabrication policy. This goes far beyond the annotations.

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?

The description is long but dense, with WICHTIG and KRITISCH markers that help an agent prioritize instructions. It earns its length, though there is minor repetition of the path restriction and attribution requirement, which keeps it from a perfect score.

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 single-parameter read-only tool with an output schema and safety annotations, the description covers input provenance, domain restriction, exact error behavior, source attribution, and link display rules. Nothing essential is missing for correct and safe use.

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. The description adds meaning beyond the schema: the URL must come from search_flexenergy_ratgeber, must be under flexenergy.at/ratgeber/, and the source_url returned must be used for display. These constraints materially aid correct invocation.

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?

The description states a specific verb and resource: 'Lädt den Inhalt eines konkreten FlexEnergy-Ratgeber-Artikels' (loads the content of a specific article). It also scopes the tool by requiring a URL from search_flexenergy_ratgeber and restricting to flexenergy.at/ratgeber/, clearly differentiating it from search and other sibling tools.

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 description explicitly says the URL comes from search_flexenergy_ratgeber, establishing when the tool should be used. It also gives an explicit when-not: any URL outside flexenergy.at/ratgeber/ returns an error, and the agent must not pretend to read it, must not fabricate content, and should tell the user there is no access. This is direct usage guidance with clear exclusions.

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