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Polymarket Fill Risk

polymarket_fill_risk
Read-onlyIdempotent

Realizable-vs-theoretical edge check against live CLOB order-book depth. REQUIRES one of market (single-market mode) or event (basket/partition mode). SINGLE-MARKET: pass a market slug/URL + side (buy_yes|sell_yes|buy_no|sell_no, default buy_yes) + size_usd (default 1000 — max spend on buys, target proceeds on sells); walks the ladder and returns top_of_book, vwap_fill_price, slippage_pp, shares_filled, max_fillable_usd, and a verdict (clean|degraded|cannot_fill). BASKET: pass an event slug/URL + side (sell_yes = capture overround by selling every leg, buy_yes = capture underround; default auto from partition sum) + size_usd interpreted as settlement notional S (shares per leg; each share pays $1); returns theoretical_sum vs realizable_sum (top-of-book vs VWAP across all legs), capture_ratio, profit_usd at executed size, per-leg fill detail, thin_legs[], max_clean_notional_usd, and forced_directional_risk naming the legs most likely to strand you unhedged. USE THIS before acting on any polymarket_arbitrage SELL/BUY-EVERY-LEG signal or any polymarket_edges trade above ~$500 — theoretical overround on thin books is not capturable, and partial basket fills convert an arb into an unhedged directional position (the dominant loss mode in real arb-bot P&L).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sideNoSingle-market: buy_yes | sell_yes | buy_no | sell_no (default buy_yes). Basket: sell_yes | buy_yes (default auto — sell if partition sum > 1, buy if < 1).
eventNoBasket mode: event slug or full polymarket.com URL — checks every leg of the partition.
marketNoSingle-market mode: market slug or full polymarket.com URL.
size_usdNoSingle-market: USD to spend (buys) or target proceeds (sells). Basket: settlement notional — shares per leg, each paying $1 at resolution. Default 1000, clamp 10–1,000,000.

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Added
  2. Removed
  3. Added

TDQS

A4.8/5.0
Behavior5/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, but the description adds behavioral detail: it 'walks the ladder,' returns specific metrics like vwap_fill_price and slippage_pp, and highlights risks like forced_directional_risk and thin_legs. No contradiction with annotations.

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

Conciseness4/5

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

The description is lengthy but well-structured with ALL-CAPS mode labels and a final usage directive. Every sentence adds information—modes, parameters, outputs, and risk context—making it dense rather than verbose. The front-loaded first sentence immediately conveys the core purpose.

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

Completeness5/5

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

Without an output schema, the description enumerates the return fields for both modes (top_of_book, vwap_fill_price, capture_ratio, etc.), explains edge cases (thin legs, partial fills, forced directional risk), and ties usage to sibling tools. This is comprehensive for a tool of this complexity.

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

Parameters4/5

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

Although the input schema covers all four parameters with 100% coverage (baseline 3), the description deepens semantics by explaining the dual interpretation of size_usd (max spend for buys vs target proceeds for sells vs settlement notional in basket mode) and the auto side selection based on partition sum. It also clarifies the required presence of either market or event, which the schema leaves optional.

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 opening sentence defines the tool as a 'Realizable-vs-theoretical edge check against live CLOB order-book depth.' It clearly specifies the two modes (single-market and basket) and the sibling tools it complements, distinguishing it from polymarket_arbitrage and polymarket_edges.

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

Usage Guidelines5/5

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

The description explicitly instructs 'USE THIS before acting on any polymarket_arbitrage SELL/BUY-EVERY-LEG signal or any polymarket_edges trade above ~$500.' It also explains the failure mode (partial fills converting arb to unhedged directional position), giving a strong when-to-use rationale.

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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TDQS

A3.5/5.0
Disambiguation2/5

Several tools overlap heavily: ask_pipeworx, ask_pipeworx_beta, and ask_pipeworx_grounded are near-identical routers, and the five polymarket_* tools all deal with prediction-market edge detection and filling risk. Memory and subscription tools are clear, but the data-access and research tools require careful reading to avoid selecting the wrong entry point.

Naming Consistency3/5

All names use snake_case and many follow a verb_noun pattern such as search_universities and resolve_entity, but the set mixes product-prefixed names (polymarket_*, pipeworx_*), bare verbs (remember, recall, forget), and noun phrases (entity_profile, deep_research). The ask_pipeworx_beta suffix also introduces a naming convention not used elsewhere.

Tool Count2/5

At 32 tools, the server exceeds the heavy threshold, and almost all tools are unrelated to the apparent 'universities' domain—only search_universities matches the server name. The count might suit a broad data-research platform, but it is poorly scoped for this server's stated identity.

Completeness1/5

For the domain implied by the server name, the surface is severely incomplete: only a name/country university search exists, with no university detail, ranking, program, admissions, or comparison coverage. Agents would dead-end immediately after finding a list of universities.