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 by structured data. Beyond that, the description adds nothing: it does not say whether deletion is permanent, what happens when the key is absent, or whether a namespace is created/cleaned up, which matters for a destructive operation.

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 short sentence with no wasted words and the action front-loaded. It is concise but achieves that by under-specifying rather than by editing down a richer statement.

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 destructive, no-output-schema mutation tool, the description should state irreversibility and behavior on a missing key. Neither is covered, and nothing compensates for the vacuous parameter descriptions, so an agent cannot predict failure or side effects.

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 nominally 100%, so the baseline is 3, and the description does not add scope information beyond the schema. Note that the schema's own parameter descriptions ("Key.", "Namespace.") are tautological, so the pair namespace+key must be understood from naming alone—'remembered value' at least implies a namespaced store.

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?

"Forget a remembered value" implies removal of stored memory data, which is enough to distinguish it from siblings like memory_get and memory_list. However, the verb is metaphorical rather than explicit ("delete"), and the resource is described as a "remembered value" rather than naming the namespace/key store, leaving the exact target somewhat inferential.

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 description gives no guidance on when to use this versus memory_set (to overwrite) or memory_list (to inspect), and no mention of prerequisites or state preconditions. An agent must infer entirely from the name that this is the removal path.

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