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

Annotations already declare destructiveHint=true and openWorldHint=false, so the safety profile is partly covered. The description adds real value beyond that: it discloses that historical tasks and goals still reference the archived sphere, softening what 'destructive' means in practice, and imposes a user-intent gate. It stops short of saying whether archiving is reversible or how to restore.

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?

A single compact sentence with the action front-loaded and the consequence and gating condition following. The clause 'past tasks and goals keep it' is slightly compressed/elliptical but still parseable; 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 mutation with full schema coverage and annotations carrying the safety profile, the description supplies the key behavioral nuance (history preserved) and the intent condition. Missing only reversibility/restore guidance, which is a minor gap for this simple tool.

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?

Only one parameter, and schema coverage is 100% — the schema already documents that 'sphere' accepts a case-insensitive name or id. The description adds no format, matching, or ambiguity-resolution detail, so the 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+resource ('Archive a sphere') and immediately clarifies the semantic scope: the sphere leaves every section but past tasks and goals retain it. This implicitly differentiates archiving from the deletion siblings (delete_goal, delete_task, delete_focus_point) by contrasting it with 'remove'.

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 an explicit gating condition — only archive when the user clearly asks to remove it — which is genuine when-to-use guidance rather than implied. It does not, however, name an alternative (e.g., update_sphere for renaming, or any restore path), so the guidance is clear but incomplete.

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