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

Annotations indicate readOnlyHint=false and destructiveHint=false. Description adds that the tool only updates persona data and performs no external actions, providing reassurance about its safety scope. No contradictions with annotations.

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?

Three sentences in Korean are concise and front-loaded: first sentence states the core action, second adds the benefit, third states limitations. Every sentence serves a purpose with no redundancy.

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 simple mutation tool with one parameter and no output schema, the description fully covers what it does, why it is used, and what it does not do. No gaps for an agent to misinterpret.

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 already describes the single parameter 'did' with 100% coverage. Description only references '해당 DID' without adding new parameter semantics. Baseline score of 3 is appropriate since no additional value is provided.

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?

Description clearly states the verb 'synchronize' and specific resource 'runtime of given DID.' It distinguishes from siblings (get, query, verify) by explaining it updates persona data rather than reading or verifying. The explicit limitation 'does not perform any external actions' further differentiates it.

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?

Description explains the context: ensuring the card receiver gets the current persona. However, it does not explicitly state when to avoid using this tool or alternatives. The benefit is clear, but no exclusion criteria are given.

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