set_blob_visibility

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

Annotations already declare destructive=false, idempotent=true and readOnly=false, so safety is covered by structured data. The description adds genuine context beyond that: the consequence of each state (permanent URL for public, time-limited link for private) and the required scope blob:write. It omits whether existing links are revoked or how quickly the change propagates.

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?

Two short sentences with zero filler, the action front-loaded and the state semantics following immediately. The scope note is compact and useful rather than redundant.

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 state-changing tool with no output schema, the description explains the effect but not the result (does it return the new URL or nothing?) and leaves one of three parameters undocumented. Given the annotations cover safety, this is adequate but not complete.

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 only 33% (id documented, visibility enum and workspace_id bare), so the description needs to compensate. It partly does by explaining the meaning of the two visibility values, but leaves workspace_id unexplained and gives no format or scoping detail for id.

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?

States a specific verb and resource ('Changes a Blob Storage file between public and private') and adds the observable effect (permanent URL vs temporary link). It is clearly distinct from blob siblings like get_blob_object and delete_blob_object, though it never names or contrasts them explicitly.

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?

Usage is only implied: an agent infers it should call this when it wants to flip a blob's accessibility. There is no explicit guidance on when to choose public vs private, or a pointer to blob_download_url for retrieving the 'temporary link' it mentions, so guidance stays at the minimum-viable level.

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