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

With no annotations, the description carries the full burden, and it delivers the two most important facts: an authorization requirement ('Owner only') and the destructive blast radius (kills open sessions, removes the login from every bot key). It stops short of stating irreversibility, confirmation behavior, or what happens if the named login does not exist.

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 compact sentences with the permission constraint front-loaded and no redundant restatement of the tool name. Every clause adds a distinct fact (auth level, target, cascade effects).

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 one-parameter delete tool with no annotations and no output schema, the description covers the critical risk information an agent needs (auth requirement plus cascade scope). It is close to complete, lacking only failure-mode and irreversibility 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 description coverage is 0% for the single required 'name' parameter, and the description never clarifies whether it is the login label, an ID, or something else. The only hint is that a 'saved login' is being deleted, which barely compensates for the documentation gap.

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 ('Delete a saved login') and immediately scopes what deletion entails ('end its open sessions and remove it from every bot key'). This clearly separates it from save_login, list_logins, and end_session without needing the 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 'Owner only' prefix gives a real permission precondition, which is useful context. However, it never says when to prefer this over alternatives like end_session or revoke_bot_key when only partial cleanup is wanted, leaving usage to inference.

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