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

Annotations already declare destructiveHint=true and idempotentHint=true; the description adds the crucial mitigating fact that previous contents are saved automatically and retrievable via get_memory_history. That materially changes how an agent should weigh the destructive hint, which is real value beyond structured fields.

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 sentence that front-loads the upsert semantics and ends with the recovery path. Nothing is wasted and nothing is buried.

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 14-parameter tool with nested metadata and no output schema, the description covers only the core upsert and history behavior. It says nothing about hierarchical task tracking, archiving/restoration, or tier semantics, leaving the schema to carry the entire burden.

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 100%, so the rich parameter set (tier, status, metadata, memory_type, is_archived, etc.) is fully documented in the schema. The description itself explains none of these semantics, 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 pair (create or update) plus the resource (memory) and the keying rule ('by key'). This clearly separates it from read_memory and search_memory, though it never names those siblings 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?

The upsert-by-key phrasing implies when to use it for writes, and pointing at get_memory_history gives one concrete follow-up alternative. There is no explicit guidance on when not to use it (e.g., vs update_persona or write_canvas) or on how to choose a tier.

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