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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the mutation profile is covered; the description reinforces it with 'cannot be undone' and adds a useful procedural requirement (user confirmation). It does not describe failure behavior for an unknown UUID, which is why this stops short of a 5.

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 short sentences, front-loaded with the destructive action and its outcome, followed by the safety instruction and a fallback for obtaining the UUID. Nothing is wasted.

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 destructive tool with an output schema (so return values need not be explained), the description covers purpose, irreversibility, confirmation, and UUID sourcing. Only edge-case behavior (e.g., nonexistent UUID) is absent, a minor gap.

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 100% and the single uuid parameter is fully documented in the schema itself, including its provenance. The description's mention of list_career_entries only partially overlaps that, adding no new syntax or format detail, so baseline 3 applies.

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 ('permanently deletes') and resource ('career journal entry') plus the identifier type (UUID). This clearly separates it from siblings like update_career_entry and delete_job_application_note without needing to open any schema.

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?

Gives concrete pre-call guidance: confirm with the user first, and use list_career_entries to obtain the UUID if missing. It does not explicitly contrast with update_career_entry (the non-destructive alternative), but the 'cannot be undone' framing makes the distinction inferable.

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