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

Annotations already declare this is a non-read-only, non-idempotent, non-destructive write, so the safety profile is covered. The description adds genuinely new context: the key is validated and fingerprinted server-side, accepted formats are constrained, and an authorization scope plus account prerequisite are required. It stops short of saying whether re-adding the same key errors or what happens on validation failure.

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?

Three tight sentences: the action and input format lead, the validation behavior follows, and metadata (permission, prerequisites) is bracketed at the end. Zero filler and nothing requires re-reading.

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 simple two-parameter write with no output schema, the description covers action, accepted formats, validation semantics, and auth prerequisites, which is most of what an agent needs. It omits the naming semantics of "name" and any indication of what is returned (e.g., the fingerprint).

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%, so the description must carry parameter meaning. It partially compensates by specifying the publicKey format (ssh-ed25519 / ssh-rsa / ecdsa), which is the most error-prone input, but the required "name" parameter is never explained (no naming rules, uniqueness, or display purpose), leaving half the surface undocumented.

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 gives a precise verb+resource ("Imports an OpenSSH public key") and even enumerates accepted key algorithms, which is far more specific than the title alone. It implicitly separates itself from gpucloud_generate_ssh_key (which creates a pair) by using "imports," though it never names that sibling 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?

It states the permission scope (ssh_keys:write) and the account/MCP key prerequisite, which helps an agent know it can perform the call. However, it never says when to choose this over gpucloud_generate_ssh_key or how it relates to gpucloud_list_ssh_keys/gpucloud_delete_ssh_key; usage is only implied by "imports."

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