edb_fill_memory

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

The description reveals the tool writes to memory (destructive), uses edb_write_memory_bytes internally, and returns a confirmation string. Annotations already indicate destructiveHint=true, so no contradiction. The description adds implementation context without repeating annotations, providing additional transparency.

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 well-structured with a clear purpose, examples, internal note, and explicit parameter listing. It is concise but includes an 'Args' section that somewhat repeats the schema. One sentence could be trimmed, but overall efficient.

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?

The description covers purpose, usage, parameters, internal behavior, and return value. With annotations providing destructive hint and an output schema (implied by context), the description is sufficiently self-contained for an agent to invoke the tool correctly.

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?

Despite the schema having 0% description coverage (according to context), the tool description explicitly lists each parameter with examples (e.g., '0x400000', '0x90') and clarifies the expected format. This adds meaning beyond the raw schema, which only has basic types.

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 tool fills a memory region with a repeating byte value, providing specific use cases (zeroing buffers, filling with NOPs). It distinguishes from sibling tools like edb_write_memory and edb_write_memory_bytes by highlighting it uses the latter internally and is designed for repetitive patterns.

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 gives concrete examples of when to use the tool (zeroing, NOPs) and mentions it uses edb_write_memory_bytes, implying a preferred use case for repetitive fills. However, it lacks explicit guidance on when not to use this tool versus alternatives, such as direct memory writes for non-repetitive updates.

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