Upload Drop file bytes

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

With only the vague openWorldHint annotation, the description carries the transparency burden. It clearly signals a mutating HTTP PUT and adds context about base64 encoding and size limits, but it does not disclose side effects (e.g., finalizing the upload, idempotency, fate of the reservation) or error behavior. This is adequate but not rich.

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, efficient sentence that front-loads the purpose and packs essential details (base64 body, size limit). No filler or redundancy.

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 simple 3-parameter upload with no output schema, the description covers the core action, encoding, and size. However, it omits explicit context about the reservation lifecycle, what happens after a successful upload, and how to reference the reservation ID. This creates gaps for an agent trying to sequence steps correctly.

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 67% (content_type and content_base64 documented). The description adds value by explaining that the body must be base64-encoded and that the decoded size should be ≤15MB for MCP, directly clarifying the content_base64 parameter. It also implies upload_id is the reservation identifier, which is not stated in the schema.

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 "PUT raw content for a reserved upload" uses a specific verb (PUT) and identifies the resource (raw content for a reserved upload). It clearly distinguishes from sibling tools like drop_upload_reserve, drop_upload_status, and drop_files_list by targeting the byte-content upload step in the flow.

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 phrase "for a reserved upload" implies a prerequisite: the upload must already be reserved (likely via drop_upload_reserve), and the size limit "max ~15MB decoded recommended for MCP" provides an explicit constraint. However, it does not explicitly name the alternative/reservation tool or state when not to use this tool, though the implication is strong.

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