tokportal_upload_image_from_url

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

Annotations declare readOnlyHint=false and destructiveHint=false, which is neutral. The description adds that the tool fetches from a 'public direct image URL' and stores 'permanently,' hinting at persistence behavior. However, it does not discuss side effects (e.g., storage costs, overwrites), error conditions (e.g., invalid URL, non-image), or idempotency despite the idempotency_key parameter.

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 two sentences, concise and front-loaded with the action. It could be slightly improved by adding a brief usage guideline or parameter clarification, but currently contains no wasted 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 tool has no output schema, the description does not explain the return value (e.g., success indicator, image ID, URL). For a 2-parameter tool with nested body, the description covers the core action but leaves gaps in usage context and expected output. The annotations are basic, so the description carries missing behavioral detail.

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% with all parameters described. The description adds no new meaning beyond the schema, aligning with the baseline of 3. The 'purpose' enum has a default but the description does not clarify its role; the schema already explains it. The description's mention of 'public direct image URL' reinforces the url parameter but does not add information about idempotency_key.

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 ('Import') and resource ('image from URL'). It explains what the tool does: fetches a public direct image URL and stores it permanently in TokPortal storage. There are sibling upload tools (tokportal_upload_image, tokportal_upload_image_direct) that could overlap, but the description distinguishes this one by focusing on URL import rather than direct file upload.

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 does not provide when to use this tool vs. alternatives like tokportal_upload_image or tokportal_upload_image_direct. No guidance on prerequisites (e.g., existence of bundle_id), when not to use, or what types of URLs are acceptable. The agent must infer usage from the parameter schema alone.

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