init_primes

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

With no annotations, the description carries full burden for behavioral disclosure. It fails to mention if the operation is destructive, whether it requires any preconditions, or what side effects occur (e.g., clearing existing table).

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 very short (5 words) and to the point, but lacks necessary context. It is appropriately sized for a simple tool but sacrifices completeness for brevity.

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?

For a setup tool with no output schema, the description is minimal. It does not explain what the primes table is, whether initialization is required before using prime-related functions, or any error conditions.

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 input schema already documents M as 'Upper bound for primes' with 100% coverage. The description adds no additional meaning beyond echoing 'up to M', so baseline score is appropriate.

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?

Clearly states it initializes the primes table up to an upper bound M. The verb 'Initialize' and resource 'primes table' are specific, and it distinguishes from sibling tools like 'primes' (which retrieves primes) and 'addprimes' (which adds primes).

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 on when to use this tool versus alternatives. For example, it doesn't indicate whether initializing is necessary before using the 'primes' function or what happens if called multiple times.

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