create_snapshot

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

With no annotations, the description carries the full burden, and it delivers: it discloses that collisions get a numeric suffix, the source file is not modified, snapshots are never overwritten, and DTG replacement happens rather than stacking. This is rich behavioral detail beyond the schema.

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 front-loaded with the essential DTG format and permanent-copy concept, then adds collision behavior, source-file safety, and usage guidance. Every sentence contributes unique information; nothing is redundant.

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?

Overall the description is very complete: naming, permanence, non-overwrite behavior, source safety, and when to use it are all covered. The main gap is the undocumented dest_dir parameter; since an output schema exists, return-value documentation is not required.

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 0%, so the description must compensate. It explains 'label' as an optional short label and implies file_path is the source file, but dest_dir is never mentioned, leaving one of three parameters undescribed. Meaning is added for some params but not all.

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 states a specific action ('Save a DTG-stamped permanent copy') and gives an exact naming pattern, so the tool's purpose is unmistakable. It also distinguishes snapshots from the automatic prev/anchor slots and from manage_backups, which are the closest sibling concepts.

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 explicitly says to take a snapshot before any large or risky editing pass and clarifies that snapshots are never auto-pruned and manage_backups never touches them. This gives clear context for when to prefer a snapshot, though it does not explicitly name alternatives or state when not to use it.

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