Image Namespace

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

With no annotations, the description carries the full behavioral burden. It does disclose one genuinely important trait — idempotency with respect to double-prefixing — which is the key gotcha. However, it says nothing about determinism, side effects (presumably pure), or what happens with an empty slug or an already-namespaced filename under a different slug.

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 tight sentences with the core action front-loaded and the edge case second. Nothing is wasted, though the brevity comes at the cost of the parameter and edge-case detail noted elsewhere.

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?

An output schema exists, so return-value explanation is not required. For a simple two-parameter transform the description is close to adequate, but with zero annotation and zero schema-description coverage it should say more about output shape guarantees (extension preservation, behavior on already-prefixed input).

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 does map both parameters implicitly: 'slug' is the prefix, 'filename' is the raw input. But it adds no format expectations — slug shape, whether file extensions are preserved, case handling — leaving real ambiguity for a 0%-coverage schema.

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?

States a specific transformation: take a raw filename plus a slug and produce an 'Anki-safe namespaced form'. That is a concrete verb+resource and an agent can tell it apart from batch/pipeline siblings. It does not explicitly contrast with those siblings, keeping it below a 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?

Usage is implied rather than stated: the note about extractor filenames already containing the document prefix hints at when the tool is appropriate, but there is no explicit 'use this when' or named alternative. An agent must infer that this is a pre-naming utility step.

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