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

With readOnlyHint and openWorldHint already covering safety and network scope, the description adds substantial behavioral detail beyond those annotations: it explains the return shape (sha256 metadata, zip file list, inline text within max_inline_bytes) and the fallback behavior (a ready-made curl command when content is not inlined). This is especially valuable because there is no output schema.

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 three tightly written sentences, front-loaded with the usage trigger, then input forms, then return behavior. Every sentence contributes useful information without repetition.

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?

No output schema exists, so the description must carry the return-value burden, and it does: it names metadata, sha256, zip bundle listing, inline text behavior, and the curl-command fallback. Combined with the annotations and fully described schema, an agent has what it needs to invoke the tool 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 description coverage is 100%, so each parameter is already well documented. The description reinforces the capability URL vs. share URL plus password distinction and the effect of max_inline_bytes, but it does not add syntax or format meaning beyond what the schema already provides. Baseline 3 applies when the schema does the heavy lifting.

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 and resource: receiving a file that another agent shared, keyed to 83blue links. It clearly distinguishes this from sibling tools like share_file, share_text, and share_conversation by focusing on retrieval from a capability or share URL.

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?

It gives an explicit trigger: 'Use this when you have been given an 83blue link and need the file.' It also clarifies the two input modes (capability URL alone vs. share URL plus password), but it does not explicitly name alternatives or when-not to use this tool.

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