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

The annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds that the tool returns metadata rather than file content and that device selection is optional, but it does not describe error behavior, permission requirements, or what metadata fields are returned.

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?

Two sentences, front-loaded with the usage condition, and no wasted wording. The optional device instruction is placed exactly where it is needed.

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?

There is no output schema, so the description should clarify what 'metadata' includes or at least its scope. It says metadata is returned for a file or directory, which is adequate for basic selection, but an agent would benefit from knowing whether sizes, timestamps, permissions, or types are included.

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%, so both path and device are fully documented in the schema. The description only mentions the optional device argument and does not add syntax, format, or path-resolution semantics beyond what the schema already provides.

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 verb and resource: return metadata for a file or directory via Nymrel Remote. It implicitly distinguishes itself from content-reading siblings like nymrel_remote_read_file by saying 'metadata', but it does not explicitly name or compare siblings.

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?

It gives a clear trigger: use when the user explicitly wants metadata for a file or directory. It does not state when not to use it or name alternatives such as nymrel_remote_list_directory or nymrel_remote_read_file, but the intended context is clear.

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