memory_upload_image

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

With no annotations, the description carries full burden. It discloses the upload action, returns an r2:// URL, and mentions organization by memory_id. It could be more explicit about side effects (e.g., overwrite behavior, permissions needed) but provides adequate transparency for a typical upload operation.

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 well-structured with a brief summary followed by an Args/Returns block. It is not overly long, but could be slightly more concise by removing the Returns block if output schema is sufficient. Still, it is clear and front-loaded.

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 4 parameters, no annotations, and an output schema present, the description is fairly complete. It explains all parameters and the return value. It could mention any constraints (e.g., file size limits, supported formats) but overall provides sufficient context 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?

Despite 0% schema description coverage, the description includes a full docstring for each parameter (file_path, memory_id, image_index, caption), explaining their purpose and defaults. This adds significant meaning beyond the schema's bare type hints.

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 tool uploads an image file to R2 storage and returns an r2:// reference URL, specifying the action and resource. The verb 'upload' and resource 'image file to R2' are specific, and the purpose is distinguishable from sibling tools like memory_migrate_images or memory_store_document.

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 explains when to use the tool (for uploading images to R2) but does not explicitly state when not to use it or mention alternative tools. However, the context of sibling tools implies it is for image uploads specifically, and the docstring provides clear usage context.

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