save_snapshot

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

With no annotations, the description must carry the full burden of behavioral disclosure. It implies a write operation to disk but does not explain behavior such as overwrites, file naming, error handling, required permissions, or what constitutes 'current graph state'. This is insufficient for a mutation tool.

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 short (6 words), which is not necessarily a virtue here as it omits crucial details. It is front-loaded and readable, but fails to convey enough information for confident use.

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's complexity (a save operation with an output schema and one undocumented parameter), the description is severely lacking. It does not explain output, prerequisites, or parameter semantics, leaving significant gaps for the 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 sole parameter 'session_id' has zero schema description coverage and the tool description provides no explanation of its purpose, format, or default behavior. The agent has no guidance beyond the schema's type and nullability.

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 ('persist') and resource ('current graph state') with a specific location ('.trailmark/snapshots'). It distinguishes from sibling tools which are primarily analysis or query-oriented, making the save intention unambiguous.

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 on when to use this tool versus alternatives, no prerequisites or context for invocation, and no mention of preconditions like having an active graph state or repository open.

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