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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely new context by disclosing the return shape (Markdown with title, description, content), which matters because there is no output schema; it does not mention rate limits or truncation, so it is not exhaustive.

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 lean sentences, with the capability and return format front-loaded before the routing hint. Every clause carries information; only the parenthetical return list is mildly redundant with the surrounding sentence structure.

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 one-parameter retrieval tool with no output schema, the description supplies both the input intent (any page / path) and the expected return fields, which is the important missing piece. It omits edge-case behavior (invalid URLs, missing pages) but nothing critical for correct invocation.

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 single url parameter already documents accepted forms (full URL or path, with an example). The description only implies that any page is addressable, adding no syntax or format detail beyond the schema, so the baseline 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 specific verb (returns/reads) and resource (any page of kessen-maschinenbau.de) plus the output format (Markdown with title, description, content). It also positions itself against the sibling search_machines, so an agent can tell discovery from retrieval without opening the 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?

Explicitly says to use it to read machine details (performance, formats, options) found via search_machines, which gives a clear trigger condition and names the complementary tool. It stops short of stating when not to use it (e.g., non-machine pages, or when the search snippet already suffices).

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