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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds real value beyond them by stating the effect timing ('takes effect on their next request') and the scope of what is destroyed (ids, topics, or everything). It stops short of saying whether already-delivered memories can be recalled or what happens if the person has no active shares.

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 no filler: scope and modes come first, the timing caveat second. Every clause carries information an agent needs.

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 four-parameter, destructive, no-output-schema tool, the description covers the operation, its granularities and its timing, and annotations carry the safety profile. Minor gaps remain around parameter interaction and whether revocation is reversible or retroactive.

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 only 50% (ids and concepts have no schema descriptions), so the description does real work by exposing the three revocation modes and mapping them to 'ids', 'topics' and 'everything'. It is weakened by not using the schema's term 'concepts' for topics and by not stating whether these parameters are mutually exclusive or how they combine.

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 specific verb (stops sharing) and resource (memories shared with one person), and enumerates the three revocation granularities (specific ids, whole topics, everything). An agent can tell this apart from share_with and shares_list by the inverse operation semantics, though neither sibling is named 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 implied rather than stated: the agent can infer this is the tool to call when sharing should end, and the granularity list hints at which parameter to pick. However, there is no guidance on checking existing shares first (shares_list), on precedence when several of ids/concepts/all are supplied, or on when to prefer revoking a topic vs individual ids.

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