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wspr_spots

Retrieve recent WSPR spots with filters for callsign, band, grid, SNR, and distance to analyze propagation paths.

Instructions

Get recent WSPR spots.

WSPR beacons transmit every 2 minutes on precise frequencies. Each spot is a 2-minute integration proving a propagation path exists.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
callsignNoFilter by TX or RX callsign (e.g., KI7MT, K9AN). Empty for all.
bandNoFilter by band (e.g., 20m, 40m, 10m). Empty for all bands.
hoursNoTime window in hours (1-72, default 24).
limitNoMaximum spots to return (1-200, default 50).
gridNoFilter by grid square prefix (e.g., DN13, FN31). Matches TX or RX.
min_snrNoMinimum SNR in dB (e.g., -20). Filter out weak signals.
max_snrNoMaximum SNR in dB (e.g., -5). Filter out strong signals.
min_distanceNoMinimum path distance in km (e.g., 5000 for DX only).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

With no annotations, the description must disclose behavioral traits. It mentions that WSPR beacons transmit every 2 minutes and spots represent 2-minute integrations, but does not disclose other behaviors such as data freshness limits, pagination behavior, or rate limits.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise with two sentences that directly state the purpose and add key context about WSPR spots. No redundant information; every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool has 8 parameters and an output schema (not shown), the description does not explain return values or typical usage patterns. It provides basic context but lacks guidance on how to interpret spots or combine filters. Adequate but not comprehensive.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so all parameters have descriptions in the schema. The description adds no additional meaning beyond the schema; it only restates the tool's purpose. Baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states 'Get recent WSPR spots', specifying the verb and resource. Additional context about WSPR beacon transmission intervals and integration periods distinguishes it from sibling tools like wspr_band_activity or wspr_grid_activity, which aggregate spots differently.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description does not provide explicit guidance on when to use this tool versus alternatives. It does not mention exclusions, prerequisites, or compare with sibling tools, leaving the agent to infer usage from the name and parameter schema.

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

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