blackboard_download_file_url

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

Annotations already declare readOnlyHint=false, idempotentHint=false and openWorldHint=true, so the agent knows this is a non-idempotent, network-touching operation that writes something. The description adds nothing beyond that: no statement of where the file lands, whether it overwrites, or what auth/session is required, which matters for a tool that saves a file.

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?

A single very short sentence is technically efficient, but here brevity reflects under-specification rather than conciseness. There is no front-loaded detail about inputs, destination, or result that an agent needs before invoking it.

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?

With no output schema, 0% parameter coverage, and only partially compensating annotations, the definition leaves the critical question of where and how the file is written unanswered. For a tool whose whole outcome is a saved file, this is incomplete.

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 0% for all three parameters (url, filename, outputDir). The description only echoes 'URL', leaving filename and especially outputDir (the destination directory) completely undefined in both schema and prose, so an agent must guess the semantics of the save target.

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?

Names a specific verb ('Descarga') and a specific resource type (a bbcswebdav URL from Blackboard UP), so the basic action is identifiable. However, it never distinguishes itself from close siblings like blackboard_download_attachment or blackboard_download_course_materials, so an agent cannot tell which download tool applies without inspecting schemas.

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 gives no when-to-use guidance and names no alternatives, even though several sibling tools also download Blackboard content. An agent has no signal for choosing this URL-based downloader over the attachment or course-material downloaders.

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