data_read_string

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

With no annotations provided, the description carries full burden for behavioral disclosure. It mentions the fallback relationship with get_global_variable_at, which is useful context, but doesn't describe what happens on success/failure, error conditions, memory access permissions, or return format. For a tool that reads memory, this leaves significant behavioral gaps.

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 concise with just two sentences, both of which add value: the first states the purpose, the second provides crucial usage guidance. There's zero wasted text or redundancy.

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 memory reading tool with no annotations and no output schema, the description is insufficient. It doesn't explain what constitutes a 'string' (null-terminated? length-prefixed?), encoding, maximum length, or what happens if the address is invalid. The fallback guidance is helpful but doesn't compensate for these fundamental gaps.

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 the schema already documents the 'address' parameter. The description adds no additional parameter semantics beyond what's in the schema (e.g., address format, valid ranges, or examples). This meets the baseline for high schema coverage.

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 verb 'Read' and the resource 'string at the specified address', making the purpose unambiguous. However, it doesn't explicitly differentiate from sibling tools like data_read_byte, data_read_word, etc., which likely read different data types from addresses.

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 provides explicit guidance: 'Only use this function if `get_global_variable_at` failed.' This clearly defines when to use this tool versus an alternative (get_global_variable_at), though it doesn't mention other potential alternatives like data_read_byte for different data types.

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