MemoryMesh

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

With no annotations provided, the description carries full burden but only states it's an update operation without disclosing behavioral traits. It doesn't mention if this is a partial or full update, whether it overwrites or merges fields, what permissions are needed, or potential side effects (e.g., impact on related entities). This is inadequate for a mutation tool with zero annotation coverage.

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?

The description is a single, efficient sentence with no wasted words. It's front-loaded with the core action and target, making it easy to parse quickly. Every part of the sentence contributes directly to the tool's purpose.

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?

Given the complexity (a mutation tool with nested objects, 1 parameter but many sub-properties, no output schema, and no annotations), the description is incomplete. It doesn't address how updates are applied, what the response looks like, or error conditions, making it insufficient for safe and effective use by an AI agent.

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?

The description adds no parameter semantics beyond what's implied by the tool name. With 0% schema description coverage (the schema has descriptions, but they're not counted in coverage), the description fails to compensate by explaining the input structure, required fields, or the meaning of parameters like 'update_player_character' object. This leaves the agent guessing about how to format the update data.

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 clearly states the action ('Update') and target ('an existing player_character in the knowledge graph'), which is specific and unambiguous. However, it doesn't explicitly differentiate from sibling tools like 'update_npc' or 'update_artifact' beyond the resource name, missing a clear distinction about what makes updating a player character unique compared to other entity updates.

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 provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., the player character must exist), exclusions, or comparisons to sibling tools like 'add_player_character' or 'delete_player_character', leaving the agent without context for appropriate selection.

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