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

No annotations are provided, so the description carries the full burden of disclosing behavior. It states that the tool uploads a finished PDF and requires an ownerKey, but it does not mention whether the upload is destructive, irreversible, or if it changes the envelope status (e.g., finalizes it). The term 'final' in the tool name suggests a terminal action, but the description does not clarify side effects, success/error behavior, or whether the operation can be repeated.

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 a single, compact sentence that front-loads the core action and adds a key constraint ('Nur mit ownerKey'). There is no extraneous text or repetition. It is appropriately sized for a tool with three well-documented parameters and achieves maximum clarity with minimal words.

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?

Given the low complexity (3 params, no nested objects) and lack of output schema, the description could still be more complete. It does not mention what the response or result is, whether the action is reversible, or how it fits into the envelope lifecycle (e.g., does it trigger a status change?). The description is too terse to fully cover the tool's role, especially considering the lack of annotations and output schema.

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?

The input schema already provides 100% coverage with descriptions for id, ownerKey, and pdfBase64, so the baseline is 3. The description adds some nuance by clarifying that pdfBase64 should be a 'finished' PDF (e.g., locally signed), which reinforces the schema's 'Fertiges PDF' but does not introduce new parameter-level meaning beyond what the schema already states. Overall, the description provides marginal added value on top of schema coverage.

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 clearly states the verb 'Lädt hoch' (uploads) and the resource 'fertige PDF für einen Vorgang' (finished PDF for a process), making the main action and object unambiguous. It also adds context by mentioning 'lokal signierte' (locally signed) and 'Nur mit ownerKey', which hints at the tool's specific use case within the envelope workflow. However, it does not explicitly name alternative sibling tools such as envelope_create, so differentiation is implied rather than explicit.

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 implies when to use the tool: when a PDF is finished (e.g., locally signed) and ready to be uploaded, and it restricts usage to scenarios where an ownerKey is available. It does not explicitly state what contexts are inappropriate or mention alternatives like envelope_create or envelope_send_invite, leaving some ambiguity about how this tool fits relative to siblings. The guidance is present but not fully explicit.

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