sync_session_start

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. It mentions initialization and memory retrieval but does not explain side effects (e.g., whether a session record is created or overwritten), required preconditions, or the format of the returned memories. The lack of an output schema makes this gap more significant.

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, concise sentence that states the core purpose without filler. It front-loads the action and resource, and every word earns its place. This is an example of efficient, well-structured description.

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 tool has three parameters, no output schema, and no annotations, the description is under-specified. It does not explain what a successful initialization returns, whether the session must already exist, or how memories are selected. The sibling context provides some clues but does not compensate for the lack of detail in the description itself.

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 100%, so the baseline is 3. The description adds a semantic link by mentioning 'branch context' and 'relevant memories', which hints at how git_branch and session_id are used, but it doesn't provide additional meaning beyond the schema descriptions. It meets the baseline without exceeding it.

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 uses a specific verb ('Initialize') and names the resource ('session') plus the key action ('retrieve relevant memories'). It clearly distinguishes from siblings like retrieve_session_context or store_session_context by focusing on initialization with branch context. However, it doesn't explicitly differentiate from update_session_context, so it's not a perfect 5.

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?

No guidance is provided about when to use this tool versus alternatives such as retrieve_session_context or store_session_context. There are no exclusions, prerequisites, or explicit 'use this when' instructions. The description merely states what it does, not when to choose it.

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