add_journal_entry

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

Mentions auto-extraction of mood and energy, but does not describe behavioral traits like whether it overwrites existing entries, permissions needed, or side effects. With no annotations, more detail would be warranted.

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?

Extremely concise: two lines of prose plus parameter descriptions. Every sentence adds information without redundancy. Front-loaded with the core purpose.

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 simple two-parameter tool with an output schema, the description covers the essential functionality and parameter meaning. Minor omission: does not explain what happens during auto-extraction or error handling.

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?

Provides clear, human-readable explanations for both parameters (content and image_path), which the input schema lacks. This adds significant meaning beyond the schema's property titles.

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 the tool stores a journal entry and highlights the key feature of auto-extracting mood and energy. This distinguishes it from sibling tools like add_memory_entry.

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 such as add_memory_entry. The description only states functionality without context for selection.

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