chat_syncHistory

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only offers a generic action. It does not state whether this is a read-only operation, what data it returns, or any side effects, making it impossible to anticipate impact.

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 extremely brief, but it is under-specified rather than appropriately concise. It restates the tool name without adding useful context, so it does not earn its place as an informative explanation.

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 tool with no annotations and no output schema, this description is wholly inadequate. It fails to explain the sync process, expected inputs, return values, or how to correctly invoke the tool, leaving the agent without essential context.

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%, and the input schema already provides detailed descriptions and examples for chatId and sessionId. The description adds no extra meaning beyond what the schema offers, so the baseline of 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?

The description '[Chat] Sync chat history' identifies a verb and resource, but 'sync' is vague and could mean fetch, push, or reconcile. It does not distinguish from sibling tools like client_syncHistory or chat_fetchMessages, leaving the exact scope unclear.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention how it relates to chat_fetchMessages or client_syncHistory, nor any prerequisites or context for invoking it.

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